Schwartz, Bernard, author
Little, Brown & Co., 1977
Buku Teks
Schwartz, Bernard, author
Little, Brown & Co., 1988
Buku Teks
Schwartz, Bernard, author
Little, Brown & Co., 1980
Buku Teks
Culbertson, Jack A., author
Prentice-Hall, 1960
Buku Teks
edited by Robert M. Maclean
[Publisher not identified], [Date of publication not identified]
Buku Teks