APA (7th ed.) Citation

Sleffel, C. C. (2014). The Library of Work and Play: Working in Metals. Project Gutenberg.

Chicago Style (17th ed.) Citation

Sleffel, Charles Conrad. The Library of Work and Play: Working in Metals. Project Gutenberg, 2014.

MLA (9th ed.) Citation

Sleffel, Charles Conrad. The Library of Work and Play: Working in Metals. Project Gutenberg, 2014.

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