Stephen N. Elliot, Thomas R. Kratochwill, Joan Littlefield Cook, John F. Travers, authors
McGraw-Hill Book , 2000
Buku Teks
Elliott, Stephen N.
McGraw-Hill , 2000
Multimedia
Elliott, Stephen N.
McGraw-Hill, 2000
Multimedia
Mager, Robert F.
Fearon, 1968
Buku Teks
Lefrancois, Guy R.
Wodsworth publications , 1985
Buku Teks