Silvertown, Jonathan W.
Longman, 1987
Buku Teks
Hazen, William E.
W.B. Saunders Company, 1970
Buku Teks
Ehrlich, Paul R.
W.H. Freeman, 1970
Buku Teks
Hazen, William E.
W.B. Saunders Company, 1964
Buku Teks
Begon, Michael
Sinauer Associates, 1986
Buku Teks