Little, Brown , 1970
Buku Teks
Christian Soe
McGraw-Hill, 2004
Buku Teks
Barringron, Lowell
Wadsworth and Cengage Learning, 2013
Buku Teks
Sodaro, Michael J.
McGraw-Hill, Higher Education, 2008
Buku Teks
Almond, Gabriel A.
Little, Brown & Co., 1978
Buku Teks