Leach, Julian Gilbert, author
McGraw-Hill, 1940
Buku Teks
Stapley, J.H., author
CRC Press, 1969
Buku Teks
Petherbridge, F.R., author
Cambridge University Press, 2013
Buku Teks
Pavlovsky, E.
Peace Publishers, [date of publication not identified]
Buku Teks
Cravens, Richard H., author
Time-Life Books, 1977
Buku Referensi