Sheldon, S. (2004). Are you afraid of the dark? Harper Collins.
Cita Chicago (17th ed.)Sheldon, Sidney. Are You Afraid of the Dark? London: Harper Collins, 2004.
Cita MLA (8th ed.)Sheldon, Sidney. Are You Afraid of the Dark? Harper Collins, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.