Cita APA (7a ed.)

Newcomb, S. (1898). The Problems of astronomy. Government Printing Of.

Cita Chicago Style (17a ed.)

Newcomb, Simon. The Problems of Astronomy. Washington: Government Printing Of, 1898.

Cita MLA (9a ed.)

Newcomb, Simon. The Problems of Astronomy. Government Printing Of, 1898.