APA (7th ed.) Citation

Spyri, J., & SLaiken, D. S. (1990). Heidi. Baronet Books.

Chicago Style (17th ed.) Citation

Spyri, Johanna, and Deidre S. SLaiken. Heidi. New York: Baronet Books, 1990.

MLA (9th ed.) Citation

Spyri, Johanna, and Deidre S. SLaiken. Heidi. Baronet Books, 1990.