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
Price, Peter W., author
John Wiley & Sons, 1984
Buku Teks
Citton, Yves, author
Polity Press, 2017
Buku Teks