Gaya APA
Wagner, E., G., Lanoix, J., N. (1958).
Excreta Disposal For Rural Areas and Small Communities (1958).
Geneva:
World Health Organization.
Gaya MLA
Wagner, E., G., Lanoix, J., N..
Excreta Disposal For Rural Areas and Small Communities.
1958
Geneva:
World Health Organization,
1958.
Lawas.