Gaya APA

ARNY, T, T., Schneider, S, E. (2006). Explorations: An Introduction to Astronomy (ED. 5). New York: McGrawe-Hill.

Gaya MLA

ARNY, Thomas, T.., Schneider, Stephen, E.. "Explorations: An Introduction to Astronomy". ED. 5 New York: McGrawe-Hill, 2006. Text.