Cita APA (7th ed.)
McEvoy, J., Zárate, O., & Appignanesi, R. Introducing Stephen Hawking. Icon Books.
Cita Chicago (17th ed.)
McEvoy, J.P, Oscar Zárate, i Richard Appignanesi. Introducing Stephen Hawking. Cambridge, Inglaterra: Icon Books.
Cita MLA (9th ed.)
McEvoy, J.P, et al. Introducing Stephen Hawking. Icon Books.
Atenció: Aquestes cites poden no estar 100% correctes.