Prewitt, Bobby Ward
Hawker Bronlow Education, 1994
Buku Teks
Ahern, Charles A., author
Springer, 2011
eBooks
Omrod, Jeanne Ellis, author
Pearson Education, Inc., 2009
Buku Teks
Hilgard, Ernest R. (Ernest Ropiequet), 1904-2001, author
Prentice-Hall, 1975
Buku Teks
Schwartz, Barry, author
W.W. Norton, 1991
Buku Teks