Gaya APA
Hammer, M, J., JR, M, J, H. (2005).
Water and Wastewater Technology fifth edition (Fifth Edition).
Singapore:
Pearson.
Gaya MLA
Hammer, Mark, J.., JR, Mark, J., Hammer.
"Water and Wastewater Technology fifth edition".
Fifth Edition
Singapore:
Pearson,
2005.
Text.