Ormrod, Jeanne Ellis, author
Pearson Educational, Inc., 2003
Buku Teks
Elliott, Stephen N.
McGraw-Hill, 2000
Multimedia
Klausmeier, Herbert J., author
Harper and Row, 1975
Buku Teks
Witherington, H.C., author
Aksara Baru, 1978
Buku Teks
Ormrod, Jeanne Ellis, author
Pearson, 2020
Buku Teks