The National Association of Biology Teachers, 1970
Buku Teks
edited by John Brady
Cambridge University Press, 1982
Buku Teks
Keeton, William T., author
W.W. Norton, 1967
Buku Teks
Freeman, Scott, author
Prentice-Hall, 2002
Buku Teks
Keeton, William T., author
Penguin Books, 1976
Buku Teks