Cita APA (7a ed.)

Bohemer, G. H. (1886). List of astronomical observatories. Government Printing Office.

Cita Chicago Style (17a ed.)

Bohemer, George H. List of Astronomical Observatories. Washington: Government Printing Office, 1886.

Cita MLA (9a ed.)

Bohemer, George H. List of Astronomical Observatories. Government Printing Office, 1886.