Cita APA (7th ed.)

Hartung, E. J. (1968). Astronomical objects for southern telescopes, with an addendum for northern observatories: A handbook for amateur observers. Cambridge U.P..

Cita Chicago (17th ed.)

Hartung, E. J. Astronomical Objects for Southern Telescopes, with an Addendum for Northern Observatories: A Handbook for Amateur Observers. London: Cambridge U.P., 1968.

Cita MLA (8th ed.)

Hartung, E. J. Astronomical Objects for Southern Telescopes, with an Addendum for Northern Observatories: A Handbook for Amateur Observers. Cambridge U.P., 1968.