Gaya APA
Naiman, R, J. et al (1992).
Watershed Management, balancing sustainablility and environmental change .
Newyok:
Springer Newrk.
Gaya MLA
Naiman, Robert, J.. et al.
"Watershed Management, balancing sustainablility and environmental change".
Newyok:
Springer Newrk,
1992.
Text.