Gaya APA

Levin, M, A., Gealt, M, A. (1993). Biotreatment of industrial and hazardous waste (1993). : London : McGraw Hill Book Co.,.

Gaya MLA

Levin, Morris, A., Gealt, Michael, A. "Biotreatment of industrial and hazardous waste". 1993 : London : McGraw Hill Book Co.,, 1993. Text.