Dyfyniad APA

METCULF & EDDY. (1979). WASTE WATER ENGINEERING. TATA MCGRAW.

Dyfyniad Arddull Chicago

METCULF & EDDY. WASTE WATER ENGINEERING. TATA MCGRAW, 1979.

Dyfyniad MLA

METCULF & EDDY. WASTE WATER ENGINEERING. TATA MCGRAW, 1979.

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