Walter, Gordon A.
John Wiley , 1981
Buku Teks
Davis, Robert H.
McGraw-Hill, 1974
Buku Teks
Ahern, Charles A., author
Springer, 2011
eBooks
Pierce, W. David, author
Lawrence Erlbaum Associates, 2004
Buku Teks
Gredler, Margaret E., author
The Guilford Press, 2008
Buku Teks