Dyfyniad APA

Pimm, S. L. (2001). The world according to Pimm: A scientist audits the Earth. McGraw-Hill.

Dyfyniad Arddull Chicago

Pimm, Stuart L. The World According to Pimm: A Scientist Audits the Earth. New York: McGraw-Hill, 2001.

Dyfyniad MLA

Pimm, Stuart L. The World According to Pimm: A Scientist Audits the Earth. McGraw-Hill, 2001.

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