APA (7th ed.) Zitazioa
Heine, L. (2010). Problem solving in a foreign language. Mouton de Gruyter.
Chicago Style (17th ed.) Zitazioa
Heine, Lena. Problem Solving in a Foreign Language. Berlin ; New York: Mouton de Gruyter, 2010.
MLA (9th ed.) Zitazioa
Heine, Lena. Problem Solving in a Foreign Language. Mouton de Gruyter, 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.