Dyfyniad APA

Rana, S. V. S. (2007). Essentials of ecology and environmental science. Prentice -hall of india private limited.

Dyfyniad Arddull Chicago

Rana, S V S. Essentials of Ecology and Environmental Science. New Delhi: Prentice -hall of india private limited, 2007.

Dyfyniad MLA

Rana, S V S. Essentials of Ecology and Environmental Science. Prentice -hall of india private limited, 2007.

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