APA (7th ed.) Citation

Wallace, F. L., & Diehl. (2009). Bolden's Pets. Project Gutenberg.

Chicago Style (17th ed.) Citation

Wallace, F. L., and Diehl. Bolden's Pets. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Wallace, F. L., and Diehl. Bolden's Pets. Project Gutenberg, 2009.

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