Cita APA

Baker, R. H. (1961). An Introduction to Astronomy. Princeton, New Jersey: D. Van Nostrand.

Chicago Style Citation

Baker, Robert H. An Introduction to Astronomy. Princeton, New Jersey: D. Van Nostrand, 1961.

Cita MLA

Baker, Robert H. An Introduction to Astronomy. Princeton, New Jersey: D. Van Nostrand, 1961.

Atenció: Aquestes cites poden no estar 100% correctes.