Gaya APA

Douglas, M. (1955). Accident Prevention in Non Ferrous-Metal Processing, Plants 3 : Smelters, Refineries, Reduction Plants . : U.S. Goverment Printing Office.

Gaya MLA

Douglas, McKay. "Accident Prevention in Non Ferrous-Metal Processing, Plants 3 : Smelters, Refineries, Reduction Plants". : U.S. Goverment Printing Office, 1955. Text.