Gaya APA

Greenberg, M, J, T, A, E. (1971). Standard Methods for The Examination of Water & Wastewater . Geneva: American Public Health Asociation.

Gaya MLA

Greenberg, Michael, J., Tairas,, Arnold, E.. "Standard Methods for The Examination of Water & Wastewater". Geneva: American Public Health Asociation, 1971. Lawas.