Cita APA (7th ed.)
Soanes, C., & Ferguson, S. (2009). Oxford a-z of spelling. Oxford University Press.
Cita Chicago (17th ed.)
Soanes, Catherina, i Sheila Ferguson. Oxford A-z of Spelling. New Delhi: Oxford University Press, 2009.
Cita MLA (9th ed.)
Soanes, Catherina, i Sheila Ferguson. Oxford A-z of Spelling. Oxford University Press, 2009.
Atenció: Aquestes cites poden no estar 100% correctes.