Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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