APA (7th ed.) Citation

Marsden, B. G. (1975). Catalogue of cometary orbits (2. ed.). Smithsonian Astrophysical Observatory.

Chicago Style (17th ed.) Citation

Marsden, Brian G. Catalogue of Cometary Orbits. 2. ed. Cambridge, Mass: Smithsonian Astrophysical Observatory, 1975.

MLA (9th ed.) Citation

Marsden, Brian G. Catalogue of Cometary Orbits. 2. ed. Smithsonian Astrophysical Observatory, 1975.