Gaya APA

Schneider, S, E., Arny, T, T. (2008). Explorations: an introduction to astronomy (Ed. ke-5). : McGraw-Hill.

Gaya MLA

Schneider, Stephen, E.., Arny, Thomas, T.. "Explorations: an introduction to astronomy". Ed. ke-5 : McGraw-Hill, 2008. Textbook.