Cita APA (7a ed.)

Davies, P. C. W. (1995). About time: Einstein's unfinished revolution. Penguin Books.

Cita Chicago Style (17a ed.)

Davies, P. C. W. About Time: Einstein's Unfinished Revolution. London [etc.]: Penguin Books, 1995.

Cita MLA (9a ed.)

Davies, P. C. W. About Time: Einstein's Unfinished Revolution. Penguin Books, 1995.