Klass, Morton
J.B. Lippincott, 1971.
Buku Teks
Spoonley, Paul
Oxford University Press, 1990
Buku Teks
The Unesco Press, 1974
Buku Teks
Glenn Adams, editor
Decade of Behavior (American Psychological Association), 2008
Buku Teks
Fredrickson, George M.
Univ. of California Press, 2000
Buku Teks