Cita APA (7th ed.)
Arny, T. T. (1994). Explorations: An introduction to astronomy. Mosby.
Cita Chicago (17th ed.)
Arny, Thomas T. Explorations: An Introduction to Astronomy. St. Louis: Mosby, 1994.
Cita MLA (9th ed.)
Arny, Thomas T. Explorations: An Introduction to Astronomy. Mosby, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.