Cita APA (7a ed.)

Einstein, A., & Lawson, R. W. (1920). Relativity: The special & the general theory : a popular exposition (2nd. ed.). Methuen.

Cita Chicago Style (17a ed.)

Einstein, Albert, y Robert W. Lawson. Relativity: The Special & the General Theory : A Popular Exposition. 2nd. ed. London: Methuen, 1920.

Cita MLA (9a ed.)

Einstein, Albert, y Robert W. Lawson. Relativity: The Special & the General Theory : A Popular Exposition. 2nd. ed. Methuen, 1920.