APA (7th ed.) Citation

Walter, B. (1946). Theme and variations: An autobiography. Alfred A. Knopf.

Chicago Style (17th ed.) Citation

Walter, Bruno. Theme and Variations: An Autobiography. Nueva York: Alfred A. Knopf, 1946.

MLA (9th ed.) Citation

Walter, Bruno. Theme and Variations: An Autobiography. Alfred A. Knopf, 1946.