Gaya APA

UK), I, M, (, O, M. (2008). Introduction to Astronomy and Cosmology . Amerika: Wiley (John Wiley & Sons, Ltd.).

Gaya MLA

UK), Ian, Morison, (University, Of, Manchester;. "Introduction to Astronomy and Cosmology". Amerika: Wiley (John Wiley & Sons, Ltd.), 2008. Text.