APA

Kobbe G., Harewood G. H. H. L. & Kobbe G. (1987). The definitive Kobbe's opera book. New York: Putnam.

Chicago

Kobbe Gustav, Harewood George Henry Hubert Lascelles and Kobbe Gustav. 1987. The definitive Kobbe's opera book. New York: Putnam.

Harvard

Kobbe G., Harewood G. H. H. L. and Kobbe G. (1987). The definitive Kobbe's opera book. New York: Putnam.

MLA

Kobbe Gustav, Harewood George Henry Hubert Lascelles and Kobbe Gustav. The definitive Kobbe's opera book. New York: Putnam. 1987.