Jackson, Debra, author
Wadsworth and Cengage Learning, 2012
Buku Teks
Ennis, Robert Hugh
Prentice-Hall, 1996
Buku Teks
Halpern, Diane F., author
Lawrence Erlbaum Associates, Publishers, 1996
Buku Teks
Shuter, Robert L., author
McGraw-Hill, 1966
Buku Teks
by Gregory Bassham [and others]
McGraw-Hill, 2013
Buku Teks