Gaya APA
A.Duerr, W.
(1973).
Timber: Problems Prospects Policies
(
Ed. 1)
.
New York:
university perss,ames.
Gaya MLA
A.Duerr, Wiliam.
"Timber: Problems Prospects Policies".
Ed. 1
New York:
university perss,ames,
1973.
Text.