Robinson, Patrick J.
Allyn & Bacon, Inc., 1967
Buku Teks
Westing, John Howard, author
John Wiley & Sons, 1956
Buku Teks
Bingham, Frank G., author
NTC/Contemporary Publishing Group, 2001
Buku Teks
Webster, Frederick E.
Prentice-Hall, 1972
Buku Teks
Hutt, Michael D., author
South Western Cengage Learning, 2013
Buku Teks