Mehas, Kay Yockey
Glencoe/McGraw-Hill, 1997
Buku Teks
Frederick A. Bettelheim
Thomson, Brooks/Cole, 2007
Buku Teks
Thomson and Brooks/cole, 2007
Multimedia
Bettelheim, Frederick A.
Harcourt Brace College, 1995
Buku Teks
Karlson, P.
Academic Press, 1967
Buku Teks