Smith, Marilyn Z., author
Houghton-Mifflin, 1974
Buku Teks
Keck, Robert W., author
Addison-Wesley/Longman, 2000
Buku Teks
Savitch, Walter, author
Addison-Wesley, 2001
Buku Teks
by Arvid R. Eide [and others]
McGraw-Hill, 2002
Buku Teks
Hanly, Jeri R., author
Pearson, 2007
Buku Teks