APA (7th ed.) Citation

Weisstein, U. (1964). The essence of opera. Free Press of Glencoe.

Chicago Style (17th ed.) Citation

Weisstein, Ulrich. The Essence of Opera. [New York]: Free Press of Glencoe, 1964.

MLA (9th ed.) Citation

Weisstein, Ulrich. The Essence of Opera. Free Press of Glencoe, 1964.

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