APA (7th ed.) Citation

Irving, W., & Hellman, G. S. (1918). Letters of Washington Irving to Henry Brevoort. Putnam [u.a.].

Chicago Style (17th ed.) Citation

Irving, Washington, and George S. Hellman. Letters of Washington Irving to Henry Brevoort. New York: Putnam [u.a.], 1918.

MLA (9th ed.) Citation

Irving, Washington, and George S. Hellman. Letters of Washington Irving to Henry Brevoort. Putnam [u.a.], 1918.