एपीए उद्धरण

(2006). Biological nutrient removal (BNR) operation in wastewater treatment plants: WEF manual of practice no.29. Mc Graw hill.

शिकागो स्टाइल उद्धरण

Biological Nutrient Removal (BNR) Operation in Wastewater Treatment Plants: WEF Manual of Practice No.29. New York: Mc Graw hill, 2006.

एमएलए उद्धरण

Biological Nutrient Removal (BNR) Operation in Wastewater Treatment Plants: WEF Manual of Practice No.29. Mc Graw hill, 2006.