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.
.