APA (7th ed.) Citation

Heintz, K. (2019). Overview of Greek city-states Sparta and Athens. Encyclopedia Britannica.

Chicago Style (17th ed.) Citation

Heintz, Kurt. Overview of Greek City-states Sparta and Athens. Chicago, IL: Encyclopedia Britannica, 2019.

MLA (9th ed.) Citation

Heintz, Kurt. Overview of Greek City-states Sparta and Athens. Encyclopedia Britannica, 2019.

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