Cita APA (7a ed.)

Smithsonian Institution. (1881). Reports of astronomical observatories: For 1880. Government Printing Offic.

Cita Chicago Style (17a ed.)

Smithsonian Institution. Reports of Astronomical Observatories: For 1880. Washington: Government Printing Offic, 1881.

Cita MLA (9a ed.)

Smithsonian Institution. Reports of Astronomical Observatories: For 1880. Government Printing Offic, 1881.