APA (7th ed.) Citation

Cajori, F. (2013). On the History of Gunter's Scale and the Slide Rule during the Seventeenth Century. Project Gutenberg.

Chicago Style (17th ed.) Citation

Cajori, Florian. On the History of Gunter's Scale and the Slide Rule During the Seventeenth Century. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Cajori, Florian. On the History of Gunter's Scale and the Slide Rule During the Seventeenth Century. Project Gutenberg, 2013.

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