APA
Mara D. D., Cairncross S., . (1989). Guidelines for the safe use of wastewater and excreta in agriculture and aquaculture :measures for public health protection. Geneva: World Health Organization.
Chicago
Mara D Duncan, Cairncross Sandy, . 1989. Guidelines for the safe use of wastewater and excreta in agriculture and aquaculture :measures for public health protection. Geneva: World Health Organization.
Harvard
Mara D. D., Cairncross S., . (1989). Guidelines for the safe use of wastewater and excreta in agriculture and aquaculture :measures for public health protection. Geneva: World Health Organization.
MLA
Mara D Duncan, Cairncross Sandy, . Guidelines for the safe use of wastewater and excreta in agriculture and aquaculture :measures for public health protection. Geneva: World Health Organization. 1989.