APA (7th ed.) Citation

Cunningham, E. (1921). The principle of relativity (Repr.). Cambridge Univ. Press.

Chicago Style (17th ed.) Citation

Cunningham, Ebenezer. The Principle of Relativity. Repr. Cambridge: Cambridge Univ. Press, 1921.

MLA (9th ed.) Citation

Cunningham, Ebenezer. The Principle of Relativity. Repr. Cambridge Univ. Press, 1921.

Warning: These citations may not always be 100% accurate.