Dick, S. J. (2003). Sky and ocean joined: The U.S. Naval Observatory, 1830-2000. New York: Cambridge University Press.
Chicago Style aipamenaDick, Steven J. Sky and Ocean Joined: The U.S. Naval Observatory, 1830-2000. New York: Cambridge University Press, 2003.
MLA aipamenaDick, Steven J. Sky and Ocean Joined: The U.S. Naval Observatory, 1830-2000. New York: Cambridge University Press, 2003.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.