APA (7th ed.) Citation

Poe, E. A., & Ostrom, J. W. (1966). Letters. Gordian Press.

Chicago Style (17th ed.) Citation

Poe, Edgar Allan, and John Ward Ostrom. Letters. New York: Gordian Press, 1966.

MLA (9th ed.) Citation

Poe, Edgar Allan, and John Ward Ostrom. Letters. Gordian Press, 1966.