North, J. (1995). The Norton history of Astronomy and cosmology. New York: W.W.Norton & Company.
Chicago Style aipamenaNorth, John. The Norton History of Astronomy and Cosmology. New York: W.W.Norton & Company, 1995.
MLA aipamenaNorth, John. The Norton History of Astronomy and Cosmology. New York: W.W.Norton & Company, 1995.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.