Cita APA (7th ed.)

Spyri, J., Davenport, P. .., & Armino, M. (2011). Heidi. Oxford University Press.

Cita Chicago (17th ed.)

Spyri, Johanna, Paul .0 Davenport, i Monica Armino. Heidi. Oxford: Oxford University Press, 2011.

Cita MLA (8th ed.)

Spyri, Johanna, et al. Heidi. Oxford University Press, 2011.