Cita APA (7th ed.)
Asimov, I. (1958). The End of Eternity. Signet : New American Library.
Cita Chicago (17th ed.)
Asimov, Isaac. The End of Eternity. Nueva York, EUA: Signet : New American Library, 1958.
Cita MLA (9th ed.)
Asimov, Isaac. The End of Eternity. Signet : New American Library, 1958.
Atenció: Aquestes cites poden no estar 100% correctes.