Kolevzon, Edward R., author
Allyn and Bacon, 1959
Buku Teks
James, Preston E., author
John Wiley & Sons, 1980
Buku Teks
Israel, Saul, author
Holt, Rinehart and Winston, 1976
Buku Teks
James, Preston E., author
Macmillan, 1972
Buku Teks
by Les Rowntree ... [and others]
Prentice-Hall, 2011
Buku Teks