Gaya APA

COMMISSION, M, S. (1986). Water pollution control (module 3 wastewater treatment): work unit 4 the treatment and disposal of sludge . : Her Majesty's Stationary Office.

Gaya MLA

COMMISSION, MANPOWER, SERVICES. "Water pollution control (module 3 wastewater treatment): work unit 4 the treatment and disposal of sludge". : Her Majesty's Stationary Office, 1986. Laporan.