Williams, A. (2013). Research: Improve your reading and referencing skills. HarperCollins.
Cita Chicago (17th ed.)Williams, Anneli. Research: Improve Your Reading and Referencing Skills. London: HarperCollins, 2013.
Cita MLA (8th ed.)Williams, Anneli. Research: Improve Your Reading and Referencing Skills. HarperCollins, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.