Levin, Richard I., author
McGraw-Hill International Book Company, 1982
Buku Teks
Levin, Richard I., author
McGraw-Hill, 1986
Buku Teks
Levin, Richard I., author
New York, NY, McGraw-Hill
Buku Teks
Markland, Robert E., author
John Wiley & Sons, 1987
Buku Teks
edited by I. Arjang Assad, Edward A. Wasil, Gary L. Lilien
Prentice-Hall, 1992
Buku Referensi