1. Flick U. Doing Ethhnograghic Observational research. First Edition. SAGE publication ; 2007.
2. Abbaszadeh M.Validity and reliability in qualitative researches. Appl soci.2012;23(1):19-34.
3. Strauss A,Corbin J. Basics of Qualitative Research Techniques and Procedures for Developing Grounded Theory. Sage Publications; 1998.
4. Stauss A. Qualitative analysis for social scientists. Cambridge University Press; 2003.
5. Charmaz K.Constructing Grounded Theory:A Practical Guide Through Qualitative Analysis.second edition. SAGE Publications; 2006.
6. Aldiabat K. Le Navenec C.Philosophical Roots of Classical Grounded Theory: Its Foundations in Symbolic Interactionism. The Qualit Report .2011;16(4): 1063-1080.
7. Sabour S, Ghasemi F. The ethical issues in observational study on adulecent. The Iranian journal of Medical ethichs . 2011;90 (5):92-103
8. Taleghani A. The conclusion of observed from unobserved situation.Metodology of Sicial Science and Humanities. 2012;18(70):79-102.
9. Miels M, Huberman M, Saldana J.Qualitative data analysis: A methods soursebook. The third Edition. SAGE publication; 2014.
10. Oxford Learner's Dictionary. Oxford University press.2014.
11. Mohamadi B. Observation unit in qualitative study.Iranian Journal anthropology research.2013;3(2):149-162.
12. Emani M.Ethnography research in quantitative and qualitatine study.available at www.urbanmanagement.ir.
13. Vahedifard S. participant observation. Journal of Social Sciences .2009;22:82-89.
14. Mohamadi B.Observation in qualitative study. Iranian Journal of Anthropology Research .2013;3(2):145-162.
15. Paterson B, Bottorff J, Hewat R. Blending Observational Methods: Possibilities, Strategies, and Challenges. InternationalJournal of Qualitative Methods .2003; 2 (1):1-19.
16. Locke K. Grounded theory in management researh. The second publication. Sage Publication; 2003.
17. Hume L, Mulcock J. Anthropologist in field:cases in participant observation. Columbia University Press;2004.
18. Gibson W, Brown A. Working with qualitative data. The first edition. Sage publication ;2009.
19. Janson R, Wiertz L,Meyer E, Nouldos L.Reliability analysis of observational data:Problems, solutions, and software implementation.Behavior Research Methods, Instruments, & Computers.2003;35 (3): 391-399.
20. Kawulich B.Qualitative Social Research. 2005; 6(2):43-53.
21. Jorgensen D.Paticipant observation: A methodology for human studies. SAGE publication;1989.
22. Robert M. Emerson, Rachel I. Fretz, and Linda L. Shaw.Writing Ethnographic Fieldnotes The Second Edition. Chicago Guides to Writing, Editing, and Publishing;2011
23. Griffiths C.Using Grounded Theory to Analyze Qualitative Observational Data that is Obtained by Video Recording .Grounded theory review an international journal.2013; 14(1).
24. Perlman M.Ethical issues in observational research.Paediatr Child Health .2000;5 (2):89-91.
25. Li J. Ethical Challenges in Participant Observation: A Reflection on Ethnographic Fieldwork. The qualitative report.2008;13(1):102-114.
26. Guidelines for Ethical Conduct in Participant Observation:University of Toronto Social Sciences and Humanities Research Ethics Board (SSH REB) available at: www. research.utoronto.ca/wp.content/upload.