Cita APA (7a ed.)

Penrose, R., & Isham, C. J. (1986). Quantum concepts in space and time. Clarendon Press.

Cita Chicago Style (17a ed.)

Penrose, Roger, y C. J. Isham. Quantum Concepts in Space and Time. Oxford: Clarendon Press, 1986.

Cita MLA (8a ed.)

Penrose, Roger, y C. J. Isham. Quantum Concepts in Space and Time. Clarendon Press, 1986.