APA (7th ed.) Citation

Einstein, A. (1956). The meaning of relativity ([6th ed., rev.].). Methuen.

Chicago Style (17th ed.) Citation

Einstein, Albert. The Meaning of Relativity. [6th ed., rev.]. London: Methuen, 1956.

MLA (9th ed.) Citation

Einstein, Albert. The Meaning of Relativity. [6th ed., rev.]. Methuen, 1956.