Παραπομπή APA

(1980). Betz Handbook of Industrial Water Conditioning (8th.). Betz.

Παραπομπή Chicago Style

Betz Handbook of Industrial Water Conditioning. 8th. Pennysylvania: Betz, 1980.

Παραπομπή MLA

Betz Handbook of Industrial Water Conditioning. 8th. Betz, 1980.