Dyfyniad APA
Chapman, B. R., & Bolen, E. G. (2015). Ecology of North America (Second edition.). Wiley Blackwell.
Dyfyniad Arddull Chicago
Chapman, Brian R., and Eric G. Bolen. Ecology of North America. Second edition. West Sussex, England: Wiley Blackwell, 2015.
Dyfyniad MLA
Chapman, Brian R., and Eric G. Bolen. Ecology of North America. Second edition. Wiley Blackwell, 2015.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.