Ouellette, Robert J., author
Macmillan, 1983
Buku Teks
Boschmann, Erwin, author
McGraw-Hill, 1990
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
Greco, Thomas G., author
Pearson Prentice Hall, 2007
Buku Teks