Gaya APA

Curds, C., H.A., I, H. (NULL). Ecological Aspects of used-water treatment volume 2 biological activities ì and treatment processes . London:: .

Gaya MLA

Curds, C.R.., H.A., I., Hawkes,. "Ecological Aspects of used-water treatment volume 2 biological activities ì and treatment processes". London:: , NULL. Text.