Jones, Samuel B., 1933-, author
McGraw-Hill, 1979
Buku Teks
edited by C.J. Humphries
Columbia University Press, 1988
Buku Teks
Darwin, Charles, author
Penguin Books, 1985
Buku Teks
Darwin, Charles, author
The Modern Library , [date of publication not identified]
Buku Teks
Jamieson, Barrie G.M., author
Cambridge University Press, 1991
Buku Teks