United States Naval Observatory. (1872). Reports on observations of Encke's Comet during its return in 1871. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States Naval Observatory. Reports on Observations of Encke's Comet During Its Return in 1871. [Washington]: [publisher not identified], 1872.
MLA (9th ed.) CitationUnited States Naval Observatory. Reports on Observations of Encke's Comet During Its Return in 1871. [publisher not identified], 1872.
Warning: These citations may not always be 100% accurate.