Foss, Sonja K., compiler
Waveland Press, 1985
Buku Teks
Winterowd, W. Ross
Harcourt Brace Jovanovich, 1981
Buku Teks
Sloane, Thomas O., author
Oxford University Press, 2001
Buku Referensi
Jordan, John E.
Harper & Row, Publishers, 1965
Buku Teks
Winterowd, W. Ross
Holt, Rinehart and Winston, 1968
Buku Teks