APA (7th ed.) Citation

Helbaek, H. (1960). Ecological Effects of Irrigation in Ancient Mesopotamia.

Chicago Style (17th ed.) Citation

Helbaek, Hans. Ecological Effects of Irrigation in Ancient Mesopotamia. 1960.

MLA (8th ed.) Citation

Helbaek, Hans. Ecological Effects of Irrigation in Ancient Mesopotamia. 1960.

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