Denzin, Norman K., author
McGraw-Hill, 1978
Buku Teks
edited by Martin Bulmer
Macmillan, 1984
Buku Teks
Good, Carter V., author
Appleton Century Crofts, 1954
Buku Teks
Strangleman, Tim, author
Routledge: Taylor & Francis Group, 2008
Buku Teks
Madan, T. N., author
Sage, 2011
Buku Teks