Dyfyniad APA

Verma, P. S. (1983). Environmental Biology: Principles of Ecology (1st. ed.). S. Chand & Company Ltd..

Dyfyniad Arddull Chicago

Verma, P. S. Environmental Biology: Principles of Ecology. 1st. ed. New Delhi: S. Chand & Company Ltd., 1983.

Dyfyniad MLA

Verma, P. S. Environmental Biology: Principles of Ecology. 1st. ed. S. Chand & Company Ltd., 1983.

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