West, Rebecca, author
The Viking press, 1936
Buku Teks
Moore, Brookee Noel, author
McGraw-Hill, 2015
Buku Teks
Chaffee, John, author
Wadsworth/Clengage Learning , 2012
Buku Teks
Sternberg, Robert J., author
American Psychological Association , 1999
Buku Teks
Siegler, Robert S., author
Prentice-Hall, 1998
Buku Teks