Dyfyniad APA

Wratten, S. D. (1980). Field and laboratory exercises in ecology. London: Arnold.

Dyfyniad Arddull Chicago

Wratten, Stephen D. Field and Laboratory Exercises in Ecology. London: Arnold, 1980.

Dyfyniad MLA

Wratten, Stephen D. Field and Laboratory Exercises in Ecology. London: Arnold, 1980.

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