Grilly, David M. , author
Alan and Bacon, 1998
Buku Teks
Hart, Carl L., author
McGraw-Hill, 2009
Buku Teks
Avise, John C.
Serambi Ilmu Semesta, 2007
Buku Teks
Martin, Paul, author
St. Martin's Press, 1997
Buku Teks SO
Hurford, Daphne M
Scribner, 1998
Buku Teks