Dyfyniad APA

(1998). Encyclopedia of environmental analysis and remediation. New York: John Wiley and Sons.

Dyfyniad Arddull Chicago

Encyclopedia of Environmental Analysis and Remediation. New York: John Wiley and Sons, 1998.

Dyfyniad MLA

Encyclopedia of Environmental Analysis and Remediation. New York: John Wiley and Sons, 1998.

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