APA (7th ed.) Citation

Gelb, I. J. (1975). Homo Ludens in Early Mesopotamia.

Chicago Style (17th ed.) Citation

Gelb, I. J. Homo Ludens in Early Mesopotamia. Helsinki, 1975.

MLA (8th ed.) Citation

Gelb, I. J. Homo Ludens in Early Mesopotamia. 1975.

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