APA (7th ed.) Citation

Spyri, J., & Hunter, J. J. Heidi. Peter Haddock Limited.

Chicago Style (17th ed.) Citation

Spyri, Johanna, and Jenny J. Hunter. Heidi. England: Peter Haddock Limited.

MLA (9th ed.) Citation

Spyri, Johanna, and Jenny J. Hunter. Heidi. Peter Haddock Limited.

Warning: These citations may not always be 100% accurate.