Nelson, John H.
Prentice-Hall, 1997
Buku Teks
Bettelheim, Frederick A., author
Thomson, Brooks/Cole, 2007
Buku Teks
Landesberg, Joseph M., 1903-1994, author
Brooks/Cole Cengage Learning, 2012
Buku Teks
Ouellette, Robert J., author
Macmillan, 1983
Buku Teks
Cooper, Melanie M., author
McGraw-Hill, 2009
Buku Teks