Gaya APA

Kerrod, R. (1997). Macmillan Encyclopedia of Science 2: the heavens: stars, galaxies, and the solar system . New York: Macmillan Library Reference.

Gaya MLA

Kerrod, Robin. "Macmillan Encyclopedia of Science 2: the heavens: stars, galaxies, and the solar system". New York: Macmillan Library Reference, 1997. Text / Book.