Cita APA (7th ed.)

Spangenburg, R., & Moser, k. (2003). Observing the Universe. Franklin Watts.

Cita Chicago (17th ed.)

Spangenburg, Ray, i kit Moser. Observing the Universe. New York: Franklin Watts, 2003.

Cita MLA (9th ed.)

Spangenburg, Ray, i kit Moser. Observing the Universe. Franklin Watts, 2003.