Gaya APA

Holdren, J, P., Ehrlich, P, R. (1971). Global Ecology: Readings Toward a Rational Strategy for Man . New York: Harcourt Brace Jovanovich.

Gaya MLA

Holdren, John, P.., Ehrlich, Paul, R.. "Global Ecology: Readings Toward a Rational Strategy for Man". New York: Harcourt Brace Jovanovich, 1971. Art Original.