Blackman, William C., author
CRC Lewis, 1996
Buku Teks
Brunner, Calvin R., author
McGraw-Hill, 1993
Buku Referensi
Duah-Asante, D. Kofi, author
E & FN Spon, 1998
Buku Teks
edited by Milagros S. Simmons
Lewis Publisher, 1991
Buku Teks
edited by Lawrence K. Wang, Nazih K. Shammas, Yung-Tse Hung
CRC Pres, 2009
Buku Teks