APA (7th ed.) Citation

PEN America. (2009). The PEN/O. Henry prize stories. Anchor Books.

Chicago Style (17th ed.) Citation

PEN America. The PEN/O. Henry Prize Stories. New York: Anchor Books, 2009.

MLA (8th ed.) Citation

PEN America. The PEN/O. Henry Prize Stories. Anchor Books, 2009.

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