APA (7th ed.) Citation

Einstein, A., & Lawson, R. W. (1920). Relativity: The special and the general theory : a popular exposition (3rd ed.). Methuen & Co.

Chicago Style (17th ed.) Citation

Einstein, Albert, and Robert W. Lawson. Relativity: The Special and the General Theory : A Popular Exposition. 3rd ed. London: Methuen & Co, 1920.

MLA (9th ed.) Citation

Einstein, Albert, and Robert W. Lawson. Relativity: The Special and the General Theory : A Popular Exposition. 3rd ed. Methuen & Co, 1920.