Williams, A. (2013). Research: Improve your reading and referencing skills. HarperCollins.
Citazione stile Chigago Style (17a edizione)Williams, Anneli. Research: Improve Your Reading and Referencing Skills. London: HarperCollins, 2013.
Citatione MLA (8a ed.)Williams, Anneli. Research: Improve Your Reading and Referencing Skills. HarperCollins, 2013.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.