Cita APA

(1991). Postprincipia: Gravitation for physicists and astronomers. Singapore: World Scientific.

Chicago Style Citation

Postprincipia: Gravitation for Physicists and Astronomers. Singapore: World Scientific, 1991.

Cita MLA

Postprincipia: Gravitation for Physicists and Astronomers. Singapore: World Scientific, 1991.

Atenció: Aquestes cites poden no estar 100% correctes.