APA (7th ed.) Citation

Spyri, J. ., Dole, H. B., & Tierney, J. (2023). HEIDI. union square kids.

Chicago Style (17th ed.) Citation

Spyri, Johanna , Helen B. Dole, and Jim Tierney. HEIDI. NEW YORK: union square kids, 2023.

MLA (9th ed.) Citation

Spyri, Johanna , et al. HEIDI. union square kids, 2023.