Little,Brown and Company, [date of publication not identified]
Buku Teks
Ross, Martin J., author
A Fawcett Crest Book, 1967
Buku Teks
Massachusetts, 1968
Buku Teks
Ross, Martin J., author
Prentice-Hall, 1977
Buku Teks
Hall, Kermit L.
Oxford University Press, 1989
Buku Teks