APA (7th ed.) Citation

Kempe, A. B. (2008). How to Draw a Straight Line: A Lecture on Linkages. Project Gutenberg.

Chicago Style (17th ed.) Citation

Kempe, A. B. How to Draw a Straight Line: A Lecture on Linkages. Project Gutenberg, 2008.

MLA (9th ed.) Citation

Kempe, A. B. How to Draw a Straight Line: A Lecture on Linkages. Project Gutenberg, 2008.

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