Gaya APA
Metcalf, ., Eddy, .
(2004).
Wastewater Engineering : Treetment and Reuse
(
4th ed)
.
Boston:
Mc Grawhill.
Gaya MLA
Metcalf, ., Eddy, .
"Wastewater Engineering : Treetment and Reuse".
4th ed
Boston:
Mc Grawhill,
2004.
print.