Gaya APA
Paul R.Ehrlich, Anne H.Ehrlich. (1970).
Population Resoursces Environment .
New York:
W. H. Freeman and Company.
Gaya Chicago
Paul R.Ehrlich, Anne H.Ehrlich.
Population Resoursces Environment.
New York:
W. H. Freeman and Company,
1970.
Text.
Gaya MLA
Paul R.Ehrlich, Anne H.Ehrlich.
Population Resoursces Environment.
New York:
W. H. Freeman and Company,
1970.
Text.
Gaya Turabian
Paul R.Ehrlich, Anne H.Ehrlich.
Population Resoursces Environment.
New York:
W. H. Freeman and Company,
1970.
Print.