APA (7th ed.) Citation

Baker, R. H., & Fredrick, L. W. (1971). Astronomy (9.ed.). Van Nostrand Reinhold Comp.

Chicago Style (17th ed.) Citation

Baker, Robert Horace, and Laurence W. Fredrick. Astronomy. 9.ed. New York: Van Nostrand Reinhold Comp, 1971.

MLA (9th ed.) Citation

Baker, Robert Horace, and Laurence W. Fredrick. Astronomy. 9.ed. Van Nostrand Reinhold Comp, 1971.