Blum, Mark, author
Chronicle Books, 1999
Buku Referensi
editors, Tim Halliday, Kraig Adler
Facts on File, 1994
Buku Referensi
Rothschild, Bruce M., author
Springer, 2012
eBooks
Duellman, William E., author
McGraw-Hill, 1986
Buku Referensi
Carr, Archie, author
Time Incorporated, 1970
Buku Teks