Keenan, Charles W., author
Harper and Row, 1976
Buku Teks
Murphy, Daniel B., author
Ronald Press, 1980
Buku Teks
Roach, Don, author
McGraw-Hill, 1979
Buku Teks
Murphy, Daniel B., author
Ronald Press, 1969
Buku Teks
Hein, Morris, author
Brooks, 1984
Buku Teks