Dubin, Andrew J.
Pergamon Press, 1977
Buku Teks
Schwartz, Bernard
Little, Brown & Co., 1977
Buku Teks
Schwartz, Bernard
Little, Brown & Co., 1988
Buku Teks
Schwartz, Bernard
Little, Brown & Co., 1980
Buku Teks
Reed, Edward Wilson, 1913-
Prentice-Hall, 1977
Buku Teks