Cita APA (7th ed.)
Unger, P. K. (1975). Ignorance: A case for scepticism. Clarendon Press.
Cita Chicago (17th ed.)
Unger, Peter K. Ignorance: A Case for Scepticism. Oxford [Eng.]: Clarendon Press, 1975.
Cita MLA (9th ed.)
Unger, Peter K. Ignorance: A Case for Scepticism. Clarendon Press, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.