Etherington, John R.
John Wiley & Sons, 1975
Buku Teks
Ehrlich, Paul R., author
W.H. Freeman, 1970
Buku Teks
Boughey, Arthur S., author
McMillan Publisher, 1975
Buku Teks
Etherington, John R.
Wiley Eastern, 1976
Buku Teks
Graham, Peter, author
Blackwell Scientific Publications, 2003
Buku Teks