Kroes, Michael J.
Glencoe, 1993
Buku Teks
Stephenson, D. J. (Derek John), author
Newnes, 1994
Buku Referensi
Butler, Don, author
Elsevier Butterworth-Heinemann, 2000
Buku Referensi
Hayes, Denis, author
Island Press, 2000
Buku Teks
Hayes, Denis, author
Island Press, 2000
Buku Teks