APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.