Gaya APA
HAMMER, J, M. et al
(2001).
WATER AND WASTEWATER TECHNOLOGY
.
AMERIKA:
PRENTICE HALL NTERNATIOAL.
Gaya MLA
HAMMER, J., MARK. et al.
"WATER AND WASTEWATER TECHNOLOGY".
AMERIKA:
PRENTICE HALL NTERNATIOAL,
2001.
Text.