Callahan, Parnell Joseph Terence
Oceana Publications, 1970
Buku Teks
Ross, Martin J.
A Fawcett Crest Book, 1975
Buku Teks
Ross, Martin J.
Prentice-Hall, 1977
Buku Teks
Hales, Michael G.
Prentice-Hall, 1989.
Buku Teks
Lieberman, Jethro Koller.
Harcourt Brace Jovanovich, 1989
Buku Teks