Dyfyniad APA

Foundation for Environmental Conservation. (1974). Environmental conservation. Elsevier Sequoia.

Dyfyniad Arddull Chicago

Foundation for Environmental Conservation. Environmental Conservation. Lausanne: Elsevier Sequoia, 1974.

Dyfyniad MLA

Foundation for Environmental Conservation. Environmental Conservation. Elsevier Sequoia, 1974.

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