APA (7th ed.) Citation

Einstein, A. (1977). Relativity: The special and the general theory ; a popular exposition (15. enlarged ed., 6. paperback repr.). Methuen.

Chicago Style (17th ed.) Citation

Einstein, Albert. Relativity: The Special and the General Theory ; a Popular Exposition. 15. enlarged ed., 6. paperback repr. London: Methuen, 1977.

MLA (9th ed.) Citation

Einstein, Albert. Relativity: The Special and the General Theory ; a Popular Exposition. 15. enlarged ed., 6. paperback repr. Methuen, 1977.