Gaya APA
Owen, Oliver S.. (1971).
Natural resource conservation: an ecological approach (text).
New York:
Macmillan.
Gaya Chicago
Owen, Oliver S..
Natural resource conservation: an ecological approach.
text
New York:
Macmillan,
1971.
.
Gaya MLA
Owen, Oliver S..
Natural resource conservation: an ecological approach.
text
New York:
Macmillan,
1971.
.
Gaya Turabian
Owen, Oliver S..
Natural resource conservation: an ecological approach.
text
New York:
Macmillan,
1971.
.