APA (7th ed.) Citation

Berris, L., & Heintz, K. (2019). Discover ancient Greece and the contrasting city-states of Athens and Sparta. Encyclopedia Britannica.

Chicago Style (17th ed.) Citation

Berris, Linda, and Kurt Heintz. Discover Ancient Greece and the Contrasting City-states of Athens and Sparta. Chicago, IL: Encyclopedia Britannica, 2019.

MLA (9th ed.) Citation

Berris, Linda, and Kurt Heintz. Discover Ancient Greece and the Contrasting City-states of Athens and Sparta. Encyclopedia Britannica, 2019.