APA (7th ed.) Citation

Ash, P. (2007). Sing opera!: The opera "Keepers of the night". American Film Foundation.

Chicago Style (17th ed.) Citation

Ash, Peter. Sing Opera!: The Opera "Keepers of the Night". Santa Monica, CA: American Film Foundation, 2007.

MLA (9th ed.) Citation

Ash, Peter. Sing Opera!: The Opera "Keepers of the Night". American Film Foundation, 2007.