APA (7th ed.) Citation

Waller, M. E., & Keller, A. I. (2010). A Cry in the Wilderness. Project Gutenberg.

Chicago Style (17th ed.) Citation

Waller, Mary E., and Arthur Ignatius Keller. A Cry in the Wilderness. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Waller, Mary E., and Arthur Ignatius Keller. A Cry in the Wilderness. Project Gutenberg, 2010.

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