Davis, Hannibal Albert, author
American Book, 1933
Buku Teks
Marcus, Marvin, author
Houghton Mifflin, 1970
Buku Teks
Rice, Bernard J., author
Prindle, Weber & Schmidt, 1975
Buku Teks
Cameron, Edward A., author
Holt, Rinehart and Winston, 1965
Buku Teks
Pignani, Tullio J., author
Harcourt, Brace, and World, 1968
Buku Teks