Davis, Robert H.
McGraw-Hill, 1974
Buku Teks
Ahern, Charles A.
Springer, 2011
eBooks
Pierce, W. David
Lawrence Erlbaum Associates, 2004
Buku Teks
Gredler, Margaret E.
The Guilford Press, 2008
Buku Teks
Omrod, Jeanne Ellis
Pearson Education, Inc., 2009
Buku Teks