Michael Worek, editor
Firefly Books Ltd., 2008
Buku Teks
Nobel Prize Series
International Merchandising Corporation, 1997
Buku Referensi
World Scientific, 2014
Buku Teks
Brownlee, George G., 1942-, author
Cambridge University Press, 2014
Buku Teks
New Delhi Encyclopaedia Britannica 2001
Buku Referensi