Bearden, James H., author
Holt, Rinehart and Winston , 1969
Buku Teks
Musselman, Vernon A., author
Prentice Hall of India, 1982
Buku Teks
Musselman, Vernon A., author
Prentice-Hall, 1977
Buku Teks
Rugman, Alan M., author
McGraw-Hill, 1985
Buku Teks
Rugman, Alan M., author
McGraw-Hill , 1985
Buku Teks