APA (7th ed.) Citation

Butler, D. H., & Budgen, T. (2021). THE TREASURE TROOP: Mr. Summerling's Secret Code. Penguin Workshop.

Chicago Style (17th ed.) Citation

Butler, Dori Hillested, and Tim Budgen. THE TREASURE TROOP: Mr. Summerling's Secret Code. New York: Penguin Workshop, 2021.

MLA (9th ed.) Citation

Butler, Dori Hillested, and Tim Budgen. THE TREASURE TROOP: Mr. Summerling's Secret Code. Penguin Workshop, 2021.