APA-referens (7:e uppl.)

Metcalf. (2012). WASTEWATER ENGINEERING: TREATMENT AND REUSE (4 TH.). TMH.

Chicago-referens (17:e uppl.)

Metcalf. WASTEWATER ENGINEERING: TREATMENT AND REUSE. 4 TH. NEW DELHI: TMH, 2012.

MLA-referens (9:e uppl.)

Metcalf. WASTEWATER ENGINEERING: TREATMENT AND REUSE. 4 TH. TMH, 2012.