Bloom, Benyamin S., author
McGraw-Hill, 1976
Buku Teks
Lefrancois, Guy R., author
Wadsworth, 2012
Buku Teks
Hillner, Kenneth P.
Pergamon Press , 1978
Buku Teks
Ormrod, Jeanne Ellis, author
Macmillan, 1990
Buku Teks
Garry, Ralph
Prentice-Hall, 1969
Buku Teks