APA (7th ed.) Zitazioa

Spyri, J. (2012). Heidi. New Central Book Agency.

Chicago Style (17th ed.) Zitazioa

Spyri, Johanna. Heidi. Kolkata: New Central Book Agency, 2012.

MLA (9th ed.) Zitazioa

Spyri, Johanna. Heidi. New Central Book Agency, 2012.