APA (7th ed.) Citation

Baker, R. H. (1940). An introduction to astronomy. D. Van Nostrand company, inc.

Chicago Style (17th ed.) Citation

Baker, Robert Horace. An Introduction to Astronomy. New York: D. Van Nostrand company, inc, 1940.

MLA (9th ed.) Citation

Baker, Robert Horace. An Introduction to Astronomy. D. Van Nostrand company, inc, 1940.

Warning: These citations may not always be 100% accurate.