Cita APA (7th ed.)
Clarke, A. C. Islands in the Sky. Signet : New American Library.
Cita Chicago (17th ed.)
Clarke, Arthur C. Islands in the Sky. Nueva York, EUA: Signet : New American Library.
Cita MLA (9th ed.)
Clarke, Arthur C. Islands in the Sky. Signet : New American Library.
Atenció: Aquestes cites poden no estar 100% correctes.