APA (7th ed.) Citation

Johnson, H., & Savino, D. (1932). Two guitars. Robbins Music.

Chicago Style (17th ed.) Citation

Johnson, Howard, and D. Savino. Two Guitars. New York: Robbins Music, 1932.

MLA (9th ed.) Citation

Johnson, Howard, and D. Savino. Two Guitars. Robbins Music, 1932.