edited by Bruce W. Burkhart and Wesley S. Thompson
Burgess Publishing, 1972
Buku Teks
Yarbrough, James D.
Burgess Publishing, 1970
Buku Teks
Mertens, Thomas R.
Burgess, 1968
Buku Teks
Semishin, Vasilii Ivanovich
Peace, [date of publication not identified]
Buku Teks
Sousa, John J.
Rhode Island Consortium, 1990
Buku Teks