Landesberg, Joseph M., 1903-1994, author
Brooks/Cole Cengage Learning, 2012
Buku Teks SO
Bettelheim, Frederick A., author
Thomson, Brooks/Cole, 2007
Buku Teks
Seager, Spencer L., author
Thomson Brooks/Cole, 2008
Buku Teks
Henrickson, Charles H., author
McGraw-Hill, Higher Education, 2008
Buku Teks
Bettelheim, Frederick A., author
Harcourt Brace Jovanovich College, 1991
Buku Teks