Baker, R. H. (1961). An Introduction to Astronomy. Princeton, New Jersey: D. Van Nostrand.
Chicago Style aipamenaBaker, Robert H. An Introduction to Astronomy. Princeton, New Jersey: D. Van Nostrand, 1961.
MLA aipamenaBaker, Robert H. An Introduction to Astronomy. Princeton, New Jersey: D. Van Nostrand, 1961.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.