Gaya APA
Freedman, Bill. (1989).
Environmental Ecology .
San Diego:
ACADEMIC PRESS.
Gaya Chicago
Freedman, Bill.
Environmental Ecology.
San Diego:
ACADEMIC PRESS,
1989.
Teks.
Gaya MLA
Freedman, Bill.
Environmental Ecology.
San Diego:
ACADEMIC PRESS,
1989.
Teks.
Gaya Turabian
Freedman, Bill.
Environmental Ecology.
San Diego:
ACADEMIC PRESS,
1989.
Teks.