Cita APA (7th ed.)

Boslough, J. (1984). Beyond the black hole: Stephen hawking's Universe. Fontana.

Cita Chicago (17th ed.)

Boslough, John. Beyond the Black Hole: Stephen Hawking's Universe. London: Fontana, 1984.

Cita MLA (9th ed.)

Boslough, John. Beyond the Black Hole: Stephen Hawking's Universe. Fontana, 1984.