Gaya APA

chairman, M, J, T, A. et al (1974). Standard methods : for the examination of water and wastewater (3). Amerika: American Public health Association.

Gaya MLA

chairman, Michael, J., Taras,, AWWA,. et al. "Standard methods : for the examination of water and wastewater". 3 Amerika: American Public health Association, 1974. Text.