Kennish, Michael J., author
CRC Press, 1991
Buku Teks
Starr, Cecie, author
Brooks/Cole , 2001
Buku Teks
Newman, Edward I., author
Blackwell Science, 1993
Buku Teks
Brewer, Richard, author
Saunders College Publishing, 1994
Buku Teks
Ehrlich, Paul R., author
Macmillan, 1987
Buku Teks