APA aipamena

Coelho, P., & Costa, M. J. (2007). The witch of Portobello. HarperCollins.

Chicago Style aipamena

Coelho, Paulo, and Margaret Jull Costa. The Witch of Portobello. London: HarperCollins, 2007.

MLA aipamena

Coelho, Paulo, and Margaret Jull Costa. The Witch of Portobello. HarperCollins, 2007.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.