Cita APA (7a ed.)

Davies, P. C. W. (1994). The edge of infinity: Beyond the black hole (Updated ed.). Penguin Books.

Cita Chicago Style (17a ed.)

Davies, P. C. W. The Edge of Infinity: Beyond the Black Hole. Updated ed. London [etc.]: Penguin Books, 1994.

Cita MLA (9a ed.)

Davies, P. C. W. The Edge of Infinity: Beyond the Black Hole. Updated ed. Penguin Books, 1994.