Dyfyniad APA
Goel, P. K. (2016). Water pollution: Causes, effects and control (Rev 2nd ed.). New Age International.
Dyfyniad Arddull Chicago
Goel, P K. Water Pollution: Causes, Effects and Control. Rev 2nd ed. Kolkata: New Age International, 2016.
Dyfyniad MLA
Goel, P K. Water Pollution: Causes, Effects and Control. Rev 2nd ed. New Age International, 2016.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.