Gaya APA

Macmillan Reuised Encyclopedia of Science 2 The Heavens : stars, Galaries, and the Solar System. (1997). New York: Macmillan Library Reference.

Gaya MLA

Macmillan Reuised Encyclopedia of Science 2 The Heavens : stars, Galaries, and the Solar System. Cet. 1. New York: Macmillan Library Reference, 1997. Text.