Grolier Incorporated, 1964
Buku Referensi
Columbia University Press, 1949
Buku Teks
James, Preston E., author
John Wiley & Sons, 1980
Buku Teks
Kolevzon, Edward R., author
Allyn and Bacon, 1959
Buku Teks
Israel, Saul, author
Holt, Rinehart and Winston, 1976
Buku Teks