APA (7th ed.) Citation

Hénin, S. (2010). Two early Italian key-driven calculators.

Chicago Style (17th ed.) Citation

Hénin, Silvio. Two Early Italian Key-driven Calculators. 2010.

MLA (9th ed.) Citation

Hénin, Silvio. Two Early Italian Key-driven Calculators. 2010.

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