Cunningham, William P.
McGraw-Hill, Higher Education, 2009
Buku Teks
Miller, G. Tyler (George Tyler), 1931-
Wadsworth, 1996
Buku Teks
Miller, G. Tyler (George Tyler), 1931-
Brooks/Cole-Thompson Learning, 2004
Buku Teks
editor, Leandro A. Viloria
University of the Philippines, 1984
Buku Teks
Kaufmann, Robert K.
McGraw-Hill, 2008
Buku Teks