Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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