Thomas, Edwin J., author
Sage, 1984
Buku Teks
Schroeder, David A., author
McGraw-Hill, 1995
Buku Teks
Whittaker, James K., author
Aldine, 1975
Buku Teks
Loughary, John W., author
McGraw-Hill, 1979
Buku Teks
Egan, Gerard, author
Brooks/Cole, 1986
Buku Teks