Hartung, E. J. (1968). Astronomical objects for southern telescopes, with an addendum for northern observatories: A handbook for amateur observers. Cambridge U.P..
Chicago Style (17th ed.) CitationHartung, E. J. Astronomical Objects for Southern Telescopes, with an Addendum for Northern Observatories: A Handbook for Amateur Observers. London: Cambridge U.P., 1968.
MLA (9th ed.) CitationHartung, E. J. Astronomical Objects for Southern Telescopes, with an Addendum for Northern Observatories: A Handbook for Amateur Observers. Cambridge U.P., 1968.
Warning: These citations may not always be 100% accurate.