APA aipamena

Machholz, D. (2013). The observing guide to the Messier marathon: Ahandbook and atlas. Cambridge University.

Chicago Style aipamena

Machholz, Don. The Observing Guide to the Messier Marathon: Ahandbook and Atlas. Cambridge University, 2013.

MLA aipamena

Machholz, Don. The Observing Guide to the Messier Marathon: Ahandbook and Atlas. Cambridge University, 2013.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.