Colbert, Edwin H., author
John Wiley & Sons, 1980
Buku Teks
Gadow, Hans, 1855-1928, author
Cambridge University Press , 2014
Buku Teks
edited by David Sedmera, Tobias Wang
Springer, 2012
eBooks
Simpson, George Gaylord
Pergamon Press, 1980
Buku Teks
Pough, F. Harvey, author
Prentice-Hall, 1999
Buku Teks