Cita APA (7th ed.)
Naylor, J. C. (2002). Out of the blue: A 24-hour skywatcher's guide. Cambridge University Press.
Cita Chicago (17th ed.)
Naylor, John C. Out of the Blue: A 24-hour Skywatcher's Guide. Cambridge ; New York: Cambridge University Press, 2002.
Cita MLA (9th ed.)
Naylor, John C. Out of the Blue: A 24-hour Skywatcher's Guide. Cambridge University Press, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.