Bigge, Morris L.
Harper & Row , 1982
Buku Teks
Stephen N. Elliot [and others]
McGraw-Hill, 2000
Buku Teks
Stephen N. Elliot, Thomas R. Kratochwill, Joan Littlefield Cook, John F. Travers, authors
McGraw-Hill Book , 2000
Buku Teks
Elliott, Stephen N., author
McGraw-Hill , 2000
Multimedia
Mager, Robert F., author
Fearon, 1968
Buku Teks