Musselman, Vernon A., author
Prentice-Hal , 1969
Buku Teks
Musselman, Vernon A., author
Prentice-Hall, 1977
Buku Teks
Walthall, Wylie A., author
Harper and Row, 1987
Buku Teks
Cunningham, William H., author
South-Western, 1984
Buku Teks
Madura, Jeff, author
South-Western College, 2001
Buku Teks