APA (7th ed.) Citation

Sheckley, R., & Vidmer. (2010). Keep Your Shape. Project Gutenberg.

Chicago Style (17th ed.) Citation

Sheckley, Robert, and Vidmer. Keep Your Shape. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Sheckley, Robert, and Vidmer. Keep Your Shape. Project Gutenberg, 2010.

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