Jones, K. G. (1991). Messier's nebulae and star clusters / Kenneth Glyn Jones (2nd ed.). Cambridge University Press.
Chicago Style (17th ed.) CitationJones, Kenneth Glyn. Messier's Nebulae and Star Clusters / Kenneth Glyn Jones. 2nd ed. Cambridge: Cambridge University Press, 1991.
MLA (9th ed.) CitationJones, Kenneth Glyn. Messier's Nebulae and Star Clusters / Kenneth Glyn Jones. 2nd ed. Cambridge University Press, 1991.
Warning: These citations may not always be 100% accurate.