Hurlbut, Cornelius S., author
John Wiley & Sons, 1971
Buku Teks
Winchell, Alexander N., author
John Wiley & Sons, 1937
Buku Teks
Klein, Cornelis, author
John Wiley & Sons, 1985
Buku Referensi
The Royal Society, 1977
Buku Teks
Nesse, William D.
Oxford University Press, 2009
Buku Teks