Παραπομπή APA

Lyttleton, R. (1968). Mysteries of the solar system. Oxford University.

Παραπομπή Chicago Style

Lyttleton, R.A. Mysteries of the Solar System. London: Oxford University, 1968.

Παραπομπή MLA

Lyttleton, R.A. Mysteries of the Solar System. Oxford University, 1968.