APA (7th ed.) Citation

Pittman, R. S. (1990). Origin of Mesopotamian duodecimal and sexagesimal counting systems. Philippine Journal of Linguistics.

Chicago Style (17th ed.) Citation

Pittman, Richard S. "Origin of Mesopotamian Duodecimal and Sexagesimal Counting Systems." Philippine Journal of Linguistics 1990.

MLA (9th ed.) Citation

Pittman, Richard S. "Origin of Mesopotamian Duodecimal and Sexagesimal Counting Systems." Philippine Journal of Linguistics, 1990.

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