APA (7th ed.) Citation

Boyer, C., & Zimbler, S. (2020). Top secret: Spies, codes, capers, gadgets, and classified cases revealed. National Geographic.

Chicago Style (17th ed.) Citation

Boyer, Crispin, and Suzanne Zimbler. Top Secret: Spies, Codes, Capers, Gadgets, and Classified Cases Revealed. Washington, D.C.: National Geographic, 2020.

MLA (8th ed.) Citation

Boyer, Crispin, and Suzanne Zimbler. Top Secret: Spies, Codes, Capers, Gadgets, and Classified Cases Revealed. National Geographic, 2020.

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