Cita APA (7a ed.)

Boehmer, G. H. (1879). Report of astronomical observatories. S.n.

Cita Chicago Style (17a ed.)

Boehmer, George H. Report of Astronomical Observatories. S.l.: S.n, 1879.

Cita MLA (9a ed.)

Boehmer, George H. Report of Astronomical Observatories. S.n, 1879.