APA (7th ed.) Citation

Stone, E., & Nichols, D. (1997). City-States and Their Centers: The Mesopotamian Example.

Chicago Style (17th ed.) Citation

Stone, Elizabeth, and D.L Nichols. City-States and Their Centers: The Mesopotamian Example. 1997.

MLA (8th ed.) Citation

Stone, Elizabeth, and D.L Nichols. City-States and Their Centers: The Mesopotamian Example. 1997.

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