Heilman, Madeline E., author
Richard D. Irwin, 1982
Buku Teks
Greenberg, Jerald, author
Prentice-Hall, 2003
Buku Teks
Tucker, Mary, author
Prentice-Hall, 2002
Buku Teks
Barron, Robert A., author
Allyn and Bacon, 1990
Buku Teks
Griffin, Ricky W., author
Cengage Learning, 2014
Buku Teks