APA (7th ed.) Citation

Gammond, P. (1989). Bluff your way in opera. Ravette Books.

Chicago Style (17th ed.) Citation

Gammond, Peter. Bluff Your Way in Opera. London: Ravette Books, 1989.

MLA (9th ed.) Citation

Gammond, Peter. Bluff Your Way in Opera. Ravette Books, 1989.