Ehrlich, Paul R.
Islan Press, 2004
Buku Teks
P. F. Collier & Son Corporation, 1959 ; 1969
Buku Teks
Charles W. Eliot, edited
Grolier Enterprises Corp., 1995
Buku Referensi
Saburo, Ienaga
Rowman & Littlefield Publishers, Inc., 2001
Buku Teks
Thiel, Peter A.
Virgin Books, 2015
Buku Teks