APA (7th ed.) Citation

Kunitz, S. (1955). Twentieth century authors, first supplement: A biographical dictionary of modern literature. Wilson.

Chicago Style (17th ed.) Citation

Kunitz, Stanley. Twentieth Century Authors, First Supplement: A Biographical Dictionary of Modern Literature. New York: Wilson, 1955.

MLA (9th ed.) Citation

Kunitz, Stanley. Twentieth Century Authors, First Supplement: A Biographical Dictionary of Modern Literature. Wilson, 1955.