APA (7th ed.) Citation

Prout, E. (1891). Key to the exercises in Harmony, its theory and practice (3rd ed.). Augener.

Chicago Style (17th ed.) Citation

Prout, Ebenezer. Key to the Exercises in Harmony, Its Theory and Practice. 3rd ed. London: Augener, 1891.

MLA (8th ed.) Citation

Prout, Ebenezer. Key to the Exercises in Harmony, Its Theory and Practice. 3rd ed. Augener, 1891.