APA (7th ed.) Citation

Apel, W. (1947). Masters of the keyboard: A brief survey of pianoforte music. Harvard University.

Chicago Style (17th ed.) Citation

Apel, Willi. Masters of the Keyboard: A Brief Survey of Pianoforte Music. Cambridge: Harvard University, 1947.

MLA (9th ed.) Citation

Apel, Willi. Masters of the Keyboard: A Brief Survey of Pianoforte Music. Harvard University, 1947.