edited by Bill Katz and Ruth A. Fraley
The Haworth Press, 1983
Buku Teks
Karp, Rashelle S.
Garland Publishing, Inc., 1991
Buku Referensi
edited by Wolfgang Schneider, Ruth Hengsteler, B. Sodian
Lawrence Erlbaum Assossiates, 2004
Buku Teks
Fox, Jill Englebright
Cengage Learning , 2012
Buku Teks
Fox, Jill Englebright
Wadsworth Cengage Learning, 2009
Buku Teks