Cita APA (7th ed.)

Arny, T., & Schneider, S. E. (2010). Explorations: An introduction to astronomy (6th ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Arny, Thomas, i Stephen E. Schneider. Explorations: An Introduction to Astronomy. 6th ed. Boston: McGraw-Hill, 2010.

Cita MLA (9th ed.)

Arny, Thomas, i Stephen E. Schneider. Explorations: An Introduction to Astronomy. 6th ed. McGraw-Hill, 2010.