APA (7th ed.) Citation

Piper, H. B., McGuire, J. J., & Freas, K. (2006). The Return. Project Gutenberg.

Chicago Style (17th ed.) Citation

Piper, H. Beam, John Joseph McGuire, and Kelly Freas. The Return. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Piper, H. Beam, et al. The Return. Project Gutenberg, 2006.

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