APA
(2007). Guyana standard : code of practice for the design and construction of septic tanks and associated secondary treatment and disposal systems. GeorgetownGY: GNBS.
Chicago
2007. Guyana standard : code of practice for the design and construction of septic tanks and associated secondary treatment and disposal systems. GeorgetownGY: GNBS.
Harvard
(2007). Guyana standard : code of practice for the design and construction of septic tanks and associated secondary treatment and disposal systems. GeorgetownGY: GNBS.
MLA
Guyana standard : code of practice for the design and construction of septic tanks and associated secondary treatment and disposal systems. GeorgetownGY: GNBS. 2007.