Dyfyniad APA

(1977). McGraw-Hill encyclopaedia of science and technology. McGraw-Hill.

Dyfyniad Arddull Chicago

McGraw-Hill Encyclopaedia of Science and Technology. New York: McGraw-Hill, 1977.

Dyfyniad MLA

McGraw-Hill Encyclopaedia of Science and Technology. McGraw-Hill, 1977.

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