Dyfyniad APA

(1998). Natural disasters. Library of Congress Office ; Library of Congress Photoduplication Service.

Dyfyniad Arddull Chicago

Natural Disasters. New Delhi : Washington, D.C.: Library of Congress Office ; Library of Congress Photoduplication Service, 1998.

Dyfyniad MLA

Natural Disasters. Library of Congress Office ; Library of Congress Photoduplication Service, 1998.

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