Gaya APA

Lehr, Jay H.. (1992). Rational Readings On Environmental Concerns . New York: Van Nostrand Reinhold.

Gaya Chicago

Lehr, Jay H.. Rational Readings On Environmental Concerns. New York: Van Nostrand Reinhold, 1992. .

Gaya MLA

Lehr, Jay H.. Rational Readings On Environmental Concerns. New York: Van Nostrand Reinhold, 1992. .

Gaya Turabian

Lehr, Jay H.. Rational Readings On Environmental Concerns. New York: Van Nostrand Reinhold, 1992. .