APA (7th ed.) Citation

Warren, H., & Gordon, M. (1945). I wish I knew. Triangle Music.

Chicago Style (17th ed.) Citation

Warren, Harry, and Mack Gordon. I Wish I Knew. New York: Triangle Music, 1945.

MLA (9th ed.) Citation

Warren, Harry, and Mack Gordon. I Wish I Knew. Triangle Music, 1945.