Artikel Jurnal
edited by Donna A. Zschoche; contributors: William C. Abbott
Mosby, 1986
Buku Teks
edited by Marc Treib
MIT Press, 1993
Buku Teks
Salter, Leonard A., author
University of Wisconsin Press, 1967
Buku Teks
Martin Bollard
Churchill Livingstone, 2009
Buku Teks