Gaya APA
Ehrlick, Paul R.. (1973).
Human ecology : problems and solutions / Paul R. Ehrlick .
America:
.
Gaya Chicago
Ehrlick, Paul R..
Human ecology : problems and solutions / Paul R. Ehrlick.
America:
,
1973.
.
Gaya MLA
Ehrlick, Paul R..
Human ecology : problems and solutions / Paul R. Ehrlick.
America:
,
1973.
.
Gaya Turabian
Ehrlick, Paul R..
Human ecology : problems and solutions / Paul R. Ehrlick.
America:
,
1973.
.