Gaya APA

Spyri, Johanna. (2009). Heidi . : Atria.

Gaya Chicago

Spyri, Johanna. Heidi. : Atria, 2009. Fiction.

Gaya MLA

Spyri, Johanna. Heidi. : Atria, 2009. Fiction.

Gaya Turabian

Spyri, Johanna. Heidi. : Atria, 2009. Fiction.