APA (7th ed.) Citation

Baker, R. H. (1971). Astronomy (9η έκδ.). Van Nostrand.

Chicago Style (17th ed.) Citation

Baker, Robert H. Astronomy. 9η έκδ. New York: Van Nostrand, 1971.

MLA (8th ed.) Citation

Baker, Robert H. Astronomy. 9η έκδ. Van Nostrand, 1971.