APA (7th ed.) Citation

Griffel, M. R., & Block, A. F. (1990). Operas in German: A dictionary. Greenwood Press.

Chicago Style (17th ed.) Citation

Griffel, Margaret Ross, and Adrienne Fried Block. Operas in German: A Dictionary. New York: Greenwood Press, 1990.

MLA (9th ed.) Citation

Griffel, Margaret Ross, and Adrienne Fried Block. Operas in German: A Dictionary. Greenwood Press, 1990.