Bogdan, R. C., & Hiklen, S. K. (2003). Qualitative research for education: An introduction to theory and methods (4th ed.). Allyn and Bacon.
Παραπομπή σε μορφή Chicago (17η εκδ.)Bogdan, Robert C., και Sari Knopp Hiklen. Qualitative Research for Education: An Introduction to Theory and Methods. 4th ed. BOston, MA: Allyn and Bacon, 2003.
Παραπομπή σε μορφή MLA (9th εκδ.)Bogdan, Robert C., και Sari Knopp Hiklen. Qualitative Research for Education: An Introduction to Theory and Methods. 4th ed. Allyn and Bacon, 2003.
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