Dyfyniad APA

Pitchaiah, P. S. (1991). Water ecology pollution and management. Chugh Publications.

Dyfyniad Arddull Chicago

Pitchaiah, P. Sankara. Water Ecology Pollution and Management. Allahabad: Chugh Publications, 1991.

Dyfyniad MLA

Pitchaiah, P. Sankara. Water Ecology Pollution and Management. Chugh Publications, 1991.

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