Crisp, Richard D., author
McGraw-Hill, 1957
Buku Teks
Aaker, David A., author
John Wiley & Sons, 2000
Buku Teks
Honomichl, Jack J., author
Elex Media Komputindo , 1991
Buku Teks
Boyd, Harper W., Jr., author
Richard D. Irwin, 1956
Buku Teks
Kress, George
Prentice-Hall, 1988
Buku Teks