APA (7th ed.) Citation

Kniffin, H. A., Allen, M., Cram, M., Williams, B. C., Marshall, E., Kerr, S., . . . Alexander, E. (2004). O. Henry Memorial Award Prize Stories of 1921. Project Gutenberg.

Chicago Style (17th ed.) Citation

Kniffin, Harry Anable, et al. O. Henry Memorial Award Prize Stories of 1921. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Kniffin, Harry Anable, et al. O. Henry Memorial Award Prize Stories of 1921. Project Gutenberg, 2004.

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