Dyfyniad APA

(1993). The Dorling Kindersley science encyclopedia (1st American ed.). Dorling Kindersley.

Dyfyniad Arddull Chicago

The Dorling Kindersley Science Encyclopedia. 1st American ed. London ; New York: Dorling Kindersley, 1993.

Dyfyniad MLA

The Dorling Kindersley Science Encyclopedia. 1st American ed. Dorling Kindersley, 1993.

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