Gaya APA
Simmons, I.G.. (1981).
The ecology of natural resources .
London:
Edward Arnold.
Gaya Chicago
Simmons, I.G..
The ecology of natural resources.
London:
Edward Arnold,
1981.
.
Gaya MLA
Simmons, I.G..
The ecology of natural resources.
London:
Edward Arnold,
1981.
.
Gaya Turabian
Simmons, I.G..
The ecology of natural resources.
London:
Edward Arnold,
1981.
.