Deason, Temp R., author
Burgess, 1968
Buku Teks
edited by Bruce W. Burkhart and Wesley S. Thompson
Burgess Publishing, 1972
Buku Teks
Yarbrough, James D., author
Burgess Publishing, 1970
Buku Teks
Mertens, Thomas R., author
Burgess, 1968
Buku Teks
Sousa, John J., author
Rhode Island Consortium, 1990
Buku Teks