Greenberg, Jerald, author
Pearson Education, 2003
Buku Teks
Barron, Robert A., author
Allyn and Bacon, 1990
Buku Teks
Greenberg, Jerald, author
Prentice-Hall, 1995
Buku Teks
Greenberg, Jerald, author
Prentice-Hall, 2003
Buku Teks
edited by James D. Loy and Calvin B. Peters
Oxford University Press, 1991
Buku Teks