Bank, Marcus
Sage Publications, 2001
Buku Teks
Dunn, Dana S.
Wiley-Blackwell, 2009
Buku Teks
Crano, William D.
Lawrence Erlbaum Assossiate, 2002
Buku Teks
Black, James A.
John Wiley & Sons, 1976
Buku Teks
Forcese, Dennis P.
Prentice-Hall, 1973
Buku Teks