APA Style
Ehrlich, Paul R. (1972).
Population Resources Environment .
San Fransisco:
W.H. Freeman and Company.
Chicago Style
Ehrlich, Paul R.
Population Resources Environment.
San Fransisco:
W.H. Freeman and Company,
1972.
Buku Teks.
MLA Style
Ehrlich, Paul R.
Population Resources Environment.
San Fransisco:
W.H. Freeman and Company,
1972.
Buku Teks.
Turabian Style
Ehrlich, Paul R.
Population Resources Environment.
San Fransisco:
W.H. Freeman and Company,
1972.
Buku Teks.