APA (7th ed.) Citation

Frohlich, M. (1991). Beethoven's 'Appassionata' sonata. Clarendon Press.

Chicago Style (17th ed.) Citation

Frohlich, Martha. Beethoven's 'Appassionata' Sonata. Oxford: Clarendon Press, 1991.

MLA (9th ed.) Citation

Frohlich, Martha. Beethoven's 'Appassionata' Sonata. Clarendon Press, 1991.

Warning: These citations may not always be 100% accurate.