Gaya APA
Elements of Ecology. (1992).
New York:
Harpercollins Publisher.
Gaya Chicago
Elements of Ecology.
Ketiga.
New York:
Harpercollins Publisher,
1992.
Text.
Gaya MLA
Elements of Ecology.
Ketiga.
New York:
Harpercollins Publisher,
1992.
Text.
Gaya Turabian
Elements of Ecology.
New York:
Harpercollins Publisher,
1992.
Print.