APA Style

Spyri, Johanna. (). Heidi . United Kingdom: Baronet Books.

Chicago Style

Spyri, Johanna. Heidi. United Kingdom: Baronet Books, . .

MLA Style

Spyri, Johanna. Heidi. United Kingdom: Baronet Books, . .

Turabian Style

Spyri, Johanna. Heidi. United Kingdom: Baronet Books, . .