7 1 10 BOGDAN, Robert Primary Author mixed material 0471085715 New York John Wiley & Sons 1975 BIKLEN, Sari Knopp Additional Author BOGDAN, Robert C. Primary Author mixed material 0205076955 Boston Allyn and Bacon 1982 an introduction to theory and methods BOGDAN, Robert C. Primary Author mixed material 0205076955 United States of America Allyn and Bacon 1982 BOGDAN, Robert Primary Author mixed material Surabaya Usaha Offset Printing 1992 BOGDAN, Robert Primary Author mixed material 0471085715 Inggris A Wiley-Interscience 1949 TAYLOR, Steven J. Primary Author BOGDAN, Robert Additional Author DEVAULT, Marjorie L. Additional Author mixed material 9781118767214 New Jersey John Wiley & Sons 2016 BOGDAN, Robert Primary Author mixed material Surabaya Usaha Nasional 1992