Pride, William M., author
South Western Cengage Learning, 2012
Buku Teks
Musselman, Vernon A., author
Prentice Hall of India, 1982
Buku Teks
Diamond, Jay, author
Prentice-Hall, 1975
Buku Teks
Musselman, Vernon A., author
Prentice-Hal , 1969
Buku Teks
Musselman, Vernon A., author
Prentice-Hall, 1977
Buku Teks