APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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