Gaya APA
Smith, Robert H.. (1994).
Ecology and the Environment : Time- Life's illustrated World of Science .
U.S.A:
Time Life.
Gaya Chicago
Smith, Robert H..
Ecology and the Environment : Time- Life's illustrated World of Science.
U.S.A:
Time Life,
1994.
Text.
Gaya MLA
Smith, Robert H..
Ecology and the Environment : Time- Life's illustrated World of Science.
U.S.A:
Time Life,
1994.
Text.
Gaya Turabian
Smith, Robert H..
Ecology and the Environment : Time- Life's illustrated World of Science.
U.S.A:
Time Life,
1994.
Print.