Dyfyniad APA
McGraw-Hill Companies. (2007). McGraw-Hill encyclopedia of science & technology (10th ed.). McGraw-Hill.
Dyfyniad Arddull Chicago
McGraw-Hill Companies. McGraw-Hill Encyclopedia of Science & Technology. 10th ed. New York: McGraw-Hill, 2007.
Dyfyniad MLA
McGraw-Hill Companies. McGraw-Hill Encyclopedia of Science & Technology. 10th ed. McGraw-Hill, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.