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