Cita APA (7th ed.)

Sullivan, J. W. (1949). Beethoven: His spiritual development. The New American Library.

Cita Chicago (17th ed.)

Sullivan, J. W. Beethoven: His Spiritual Development. Nueva York: The New American Library, 1949.

Cita MLA (9th ed.)

Sullivan, J. W. Beethoven: His Spiritual Development. The New American Library, 1949.