Dyfyniad APA

Gunn, A. M. (2008). Encyclopedia of disasters: Environmental catastrophes and human tragedies. Greenwood.

Dyfyniad Arddull Chicago

Gunn, Angus M. Encyclopedia of Disasters: Environmental Catastrophes and Human Tragedies. Westport: Greenwood, 2008.

Dyfyniad MLA

Gunn, Angus M. Encyclopedia of Disasters: Environmental Catastrophes and Human Tragedies. Greenwood, 2008.

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