Dyfyniad APA

Lester, J. N. (1987). Heavy Metals in Waste Water and Sludge Treatment Process. CRC.

Dyfyniad Arddull Chicago

Lester, John. N. Heavy Metals in Waste Water and Sludge Treatment Process. Florida: CRC, 1987.

Dyfyniad MLA

Lester, John. N. Heavy Metals in Waste Water and Sludge Treatment Process. CRC, 1987.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.