Enos, Matthew, author
Wadsworth, 2002
Buku Teks
Nevid, Jeffrey S., author
Wadsworth and Cengage Learning, 2012
Buku Teks
Banister, Peter, author
Open University Press, 1994
Buku Teks
edited by Cath Sulivan and Michael A. Forrester
Sage, 2019
Buku Teks
Carmichael, Leonard, author
Random House, 1957
Buku Teks