APA (7th ed.) Citation

Leuchter, E. (1943). Beethoven. Ricordi Americana.

Chicago Style (17th ed.) Citation

Leuchter, Erwin. Beethoven. Buenos Aires: Ricordi Americana, 1943.

MLA (9th ed.) Citation

Leuchter, Erwin. Beethoven. Ricordi Americana, 1943.