edited by Janice M. Morse, Janice M. Swanson, and Anton J. Kuzel
Sage, 2000
Buku Teks
Sykes, Bryan, author
Hodder & Stoughton Ltd., 2014
Buku Teks
Mason, Jennifer, author
Sage, 2009
Buku Teks
Koob, Derry D., author
Addison-Wesley, 1971
Buku Teks
Baldwin, Ernest, author
University Press, 1962
Buku Teks