Gaya APA

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

Gaya MLA

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