APA (7th ed.) Citation

Bottome, P., & Soper, J. H. G. (2008). The Dark Tower. Project Gutenberg.

Chicago Style (17th ed.) Citation

Bottome, Phyllis, and James Hamlin Gardner Soper. The Dark Tower. Project Gutenberg, 2008.

MLA (9th ed.) Citation

Bottome, Phyllis, and James Hamlin Gardner Soper. The Dark Tower. Project Gutenberg, 2008.

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