APA (7th ed.) Citation

Strindberg, A., Field, C., & Babillotte, A. (2013). Zones of the Spirit: A Book of Thoughts. Project Gutenberg.

Chicago Style (17th ed.) Citation

Strindberg, August, Claud Field, and Arthur Babillotte. Zones of the Spirit: A Book of Thoughts. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Strindberg, August, et al. Zones of the Spirit: A Book of Thoughts. Project Gutenberg, 2013.

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