Cita APA (7th ed.)

Einstein, A. (1960). relativity- the special & the general theory. Methuen.

Cita Chicago (17th ed.)

Einstein, Albert. Relativity- the Special & the General Theory. London: Methuen, 1960.

Cita MLA (9th ed.)

Einstein, Albert. Relativity- the Special & the General Theory. Methuen, 1960.