APA (7th ed.) Citation

Playtner, H. R. (2007). An Analysis of the Lever Escapement. Project Gutenberg.

Chicago Style (17th ed.) Citation

Playtner, H. R. An Analysis of the Lever Escapement. Project Gutenberg, 2007.

MLA (9th ed.) Citation

Playtner, H. R. An Analysis of the Lever Escapement. Project Gutenberg, 2007.

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