Cita APA (7a ed.)

Rigge, W. F. (1912). The Driving Clock and the Clamp and Slow-Motion Screws of an Equatorial. s.n.

Cita Chicago Style (17a ed.)

Rigge, William F. The Driving Clock and the Clamp and Slow-Motion Screws of an Equatorial. [S.l.: s.n, 1912.

Cita MLA (9a ed.)

Rigge, William F. The Driving Clock and the Clamp and Slow-Motion Screws of an Equatorial. s.n, 1912.