Gaya APA

HAMMER, M, J., Jr, M, J, H. (2005). WATER AND WASTEWATER TECHNOLOGY (5 th). Singapore: PRENTICE HALL.

Gaya MLA

HAMMER, Mark, J., Jr, MARK, J., HAMMER,. "WATER AND WASTEWATER TECHNOLOGY". 5 th Singapore: PRENTICE HALL, 2005. Textbook.