Abdullah, Fuad A., author
Prentice-Hall International, 1987
Buku Teks
Prentice Hall International, 1991
Buku Teks
Madura, Jeff, author
Thomson South-Western, 2003
Buku Teks
Prentice Hall International, 1991
Buku Teks
Brooks, LeRoy D., author
Richard D. Irwin, 1982
Buku Teks