Cita APA

Ley, W., & Bonestell, C. (1965). Beyond the solar system. Sidgwick & Jackson.

Chicago Edition Citation

Ley, Willy, i Chesley Bonestell. Beyond the Solar System. London: Sidgwick & Jackson, 1965.

Cita MLA

Ley, Willy, i Chesley Bonestell. Beyond the Solar System. Sidgwick & Jackson, 1965.