Lowenfeld, Andreas F.
Matthew Bender and Company,Inc., 1972
Buku Teks
Pearson, Michael W., author
Pearson education, 2015
Buku Teks
Larsen, Paul B., author
Martinus Nijhoff pub., 2012
Buku Teks
Willborn, Steven L.
The Michie Company, 1993
Buku Teks
Lunney, glynn, author
West, 2010
Buku Teks