Gaya APA

Schneider, S, E, S, S, E. (2007). Pathways to astronomy.-- (Ed. 1st.--). : McGraw-Hill.

Gaya MLA

Schneider, Stephen, E, Schneider,, Stephen, E.. "Pathways to astronomy.--". Ed. 1st.-- : McGraw-Hill, 2007. Buku.