APA (7th ed.) Citation

Baker, R. H. (1961). Astronomy: A textbook for university and college students (7th ed.). Van Nostrand.

Chicago Style (17th ed.) Citation

Baker, Robert Horace. Astronomy: A Textbook for University and College Students. 7th ed. Princeton, N.J.: Van Nostrand, 1961.

MLA (9th ed.) Citation

Baker, Robert Horace. Astronomy: A Textbook for University and College Students. 7th ed. Van Nostrand, 1961.