Gaya APA

Ayres, R, M., Mara, D, D. (1996). Analysis of Wastewater for Use in Agriculture : a Laboratory Manual of Parasitological and Bacteriological Techniques . Geneva: World Health Organization.

Gaya MLA

Ayres, Rachel, M.., Mara, D., Duncan. "Analysis of Wastewater for Use in Agriculture : a Laboratory Manual of Parasitological and Bacteriological Techniques". Geneva: World Health Organization, 1996. print.