Herschel, S. J. F. W. (1901). Outlines of astronomy. Collier and Son.
Cita Chicago (17th ed.)Herschel, Sir John Frederick William. Outlines of Astronomy. New York: Collier and Son, 1901.
Cita MLA (9th ed.)Herschel, Sir John Frederick William. Outlines of Astronomy. Collier and Son, 1901.
Atenció: Aquestes cites poden no estar 100% correctes.