Citazione Stile APA (7a Edizione)

Collett, H., Williams, C., & Winearls, N. (2012). Ken & Verstaan - Geografie (First published 2012.). Cambridge University Press & Assessment.

Citazione stile Chigago Style (17a edizione)

Collett, Helen, Cheryl Williams, e Norma Winearls. Ken & Verstaan - Geografie. First published 2012. Cambridge New York Melbourne New Delhi Singapore Cape Town: Cambridge University Press & Assessment, 2012.

Citatione MLA (9a ed.)

Collett, Helen, et al. Ken & Verstaan - Geografie. First published 2012. Cambridge University Press & Assessment, 2012.