Cita APA (7th ed.)

Chaisson, E. (1993). Astronomy today. Prentice Hall.

Cita Chicago (17th ed.)

Chaisson, Eric. Astronomy Today. New Jersey: Prentice Hall, 1993.

Cita MLA (9th ed.)

Chaisson, Eric. Astronomy Today. Prentice Hall, 1993.

Atenció: Aquestes cites poden no estar 100% correctes.