Feldman, Robert S., author
McGraw-Hill, 2013
Buku Teks
Zimbardo, Philip G.
Scott Floresman & Company , 1997
Buku Teks
Ruch, Floyd L., author
Foresman, 1971
Buku Teks
Ruch, Floyd L., author
Scott, Foresman, 1958
Buku Teks
Miller, George A. (George Armitage), 1920-2012, author
Harper & Row , 1962
Buku Teks