Dyfyniad APA

Northrop, R. B., & Connor, A. N. (2013). Ecological sustainability: Understanding complex issues. CRC Press/Taylor & Francis Group.

Dyfyniad Arddull Chicago

Northrop, Robert B., and Anne N. Connor. Ecological Sustainability: Understanding Complex Issues. Boca Raton, Fl: CRC Press/Taylor & Francis Group, 2013.

Dyfyniad MLA

Northrop, Robert B., and Anne N. Connor. Ecological Sustainability: Understanding Complex Issues. CRC Press/Taylor & Francis Group, 2013.

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