Selekman, Benjamin M.
New York, N.Y., McGraw-Hill Book Company
Buku Teks
Rachels, James, 1941-2003, author
McGraw-Hill , 2012
Buku Teks
Weiss, Joseph, author
Wadsworth, 2009
Buku Teks
Hutcheson, Francis, author
Cambridge University Press, 2014
eBooks
Bendix, Reinhard, author
John Wiley & Sons, 1956
Buku Teks