Edwards, James Don, author
R. D. Irwin, 1967
Buku Teks
Roth, Charles H., author
Prentice-Hall, 1982
Buku Teks
Traynham, James G., author
Prentice-Hall, 1991
Buku Teks
Strum, Robert D., author
Prentice-Hall, 1968
Buku Teks
Hatzler, F. E.
Lembaga Pendidikan dan Pembinaan Management & Bhratara, 1973
Buku Teks