Kirst, Ashman Karen Kay, author
Cengage Learning, 2013
Buku Teks
Routledge & Kegan Paul, 1996
Buku Teks
Clarke, Stephen, author
Routledge, Taylor and Francis Group, 2000
Buku Teks
Moore, Wilbert E. (Wilbert Ellis), author
Prentice-Hall, 1963
Buku Teks
edited by Eva Etzioni-Halevy and Amitai Etzioni
Basic Books, 1964
Buku Teks