Cita APA

Asimov, I. (1967). Environments out there. London: Abelard-Schuman.

Chicago Style Citation

Asimov, Isaac. Environments Out There. London: Abelard-Schuman, 1967.

Cita MLA

Asimov, Isaac. Environments Out There. London: Abelard-Schuman, 1967.

Atenció: Aquestes cites poden no estar 100% correctes.