Sampson, Edward E.
John Wiley & Sons, 1981
Buku Teks
edit by Brenda Freshman, Louis Rubino, Yolanda (Linda) Reid Chassiakos
Jones and Bartlett, 2010
Buku Teks
McConnell, Charles R.
Jones & Bartlett Learning, 2013
Buku Teks
McConnell, Charles R.
Jones & Bartlett Learning, 2013
Buku Referensi
Bruhn, John G.
Thomas , 1991
Buku Teks