edited by Michel Hersen, William Sledge
Academic Press, 2002
Buku Referensi
Macmillan Educational Company, 1990
Buku Referensi
Grolier Incorporated, 1991
Buku Referensi
Grolier, 1994
Buku Referensi
Warren Thomas Reich, editor in chief
Simon & Schuster Macmillan, 1995
Buku Referensi