Smith, Edward E., 1940-, author
Wadsworth/Thomson Learning, 2003
Buku Teks
Morgan, Clifford T., author
McGraw-Hill, 1974
Buku Teks
Hergenhahn, B.R., 1934-, author
Wadsworth, 2014
Buku Teks
Hergenhahn, B.R., 1934-, author
Wadsworth, 2009
Buku Teks
Nietzel, Michael T., author
Prentice-Hall, 1987
Buku Teks