Cita APA (7a ed.)

Isham, C., Penrose, R., & Sciama, D. (1975). Quantum Gravity an Oxford Symposium. Oxford University Press.

Cita Chicago Style (17a ed.)

Isham, C.J, R. Penrose, y D.W Sciama. Quantum Gravity an Oxford Symposium. Oxford: Oxford University Press, 1975.

Cita MLA (9a ed.)

Isham, C.J, et al. Quantum Gravity an Oxford Symposium. Oxford University Press, 1975.