Cita APA (7th ed.)

Close, F. E. (2009). Nothing: A very short introduction. Oxford University Press.

Cita Chicago (17th ed.)

Close, F. E. Nothing: A Very Short Introduction. Oxford ; New York: Oxford University Press, 2009.

Cita MLA (9th ed.)

Close, F. E. Nothing: A Very Short Introduction. Oxford University Press, 2009.

Atenció: Aquestes cites poden no estar 100% correctes.