APA (7th ed.) Citation

Bixby, J., & Ashman, W. (2009). Zen. Project Gutenberg.

Chicago Style (17th ed.) Citation

Bixby, Jerome, and William Ashman. Zen. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Bixby, Jerome, and William Ashman. Zen. Project Gutenberg, 2009.

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