Driscoll, Marcy P
Pearson Allyn and Bacon, 2005
Buku Teks
De Cecco, John P.
Prentice-Hall, 1974
Buku Teks
Klausmeier, Herbert J.
Harper and Row, 1975
Buku Teks
Elliott, Stephen N.
McGraw-Hill, 2000
Multimedia
Stephen N. Elliot [and others]
McGraw-Hill, 2000
Buku Teks