Gaya APA

Bogdan, R, C., Biklen, S, K. (1998). Qualitative research for education : an introduction to theory and methods (3rd). United States of America: Allyn and Bacon.

Gaya MLA

Bogdan, Robert, C.., Biklen, Sari, Knopp. "Qualitative research for education : an introduction to theory and methods". 3rd United States of America: Allyn and Bacon, 1998. Text.