Johnson, Paul E. (Paul Erick), 1938-, author
John Wiley & Sons, 1971
Buku Teks
Bloom, Benyamin S., author
McGraw-Hill, 1976
Buku Teks
edited by Brian H. Ross
Elsevier, 2004
Buku Teks
Lefrancois, Guy R., author
Wadsworth, 2012
Buku Teks
Ormrod, Jeanne Ellis, author
Macmillan, 1990
Buku Teks