APA (7th ed.) Citation

Echols, J. M. (1940). The numerals one - ten in Indo-European: A study of the cardinals.

Chicago Style (17th ed.) Citation

Echols, John M. The Numerals One - Ten in Indo-European: A Study of the Cardinals. 1940.

MLA (9th ed.) Citation

Echols, John M. The Numerals One - Ten in Indo-European: A Study of the Cardinals. 1940.

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