Gaya APA
Clark, J, W. et al
(1977).
Water Supply and Pollution Cntrol
(
3)
.
Amerika Serikat:
Herper & Row.
Gaya MLA
Clark, John, W.. et al.
"Water Supply and Pollution Cntrol".
3
Amerika Serikat:
Herper & Row,
1977.
Text.