Dyfyniad APA

(1992). Environmental ecology. Akashdeep Publishing House.

Dyfyniad Arddull Chicago

Environmental Ecology. New Delhi: Akashdeep Publishing House, 1992.

Dyfyniad MLA

Environmental Ecology. Akashdeep Publishing House, 1992.

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