APA (7th ed.) Citation

Barefoot, W., & Barth, E. (2009). The Cuckoo Clock. Project Gutenberg.

Chicago Style (17th ed.) Citation

Barefoot, Wesley, and Ernie Barth. The Cuckoo Clock. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Barefoot, Wesley, and Ernie Barth. The Cuckoo Clock. Project Gutenberg, 2009.

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