APA (7th ed.) Citation

Stark, U., & Hoglund, A. (2021). Can you whistle Johanna? Gecko Press.

Chicago Style (17th ed.) Citation

Stark, Ulf, and Anna Hoglund. Can You Whistle Johanna? New Zealand: Gecko Press, 2021.

MLA (9th ed.) Citation

Stark, Ulf, and Anna Hoglund. Can You Whistle Johanna? Gecko Press, 2021.