Dyfyniad APA

(1997). McGraw-Hill encyclopedia of science and technology (8th ed.). New York: McGraw-Hill.

Dyfyniad Arddull Chicago

McGraw-Hill Encyclopedia of Science and Technology. 8th ed. New York: McGraw-Hill, 1997.

Dyfyniad MLA

McGraw-Hill Encyclopedia of Science and Technology. 8th ed. New York: McGraw-Hill, 1997.

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