Dyfyniad APA
Lapedes, D. N. (1978). McGraw-Hill encyclopedia of the geological sciences. McGraw-Hill.
Dyfyniad Arddull Chicago
Lapedes, Daniel N. McGraw-Hill Encyclopedia of the Geological Sciences. New York: McGraw-Hill, 1978.
Dyfyniad MLA
Lapedes, Daniel N. McGraw-Hill Encyclopedia of the Geological Sciences. McGraw-Hill, 1978.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.