APA (7th ed.) Citation

Quilter, R., & Stevenson, R. L. (1922). Two songs. Novello & Company.

Chicago Style (17th ed.) Citation

Quilter, Roger, and Robert Louis Stevenson. Two Songs. [London, England]: Novello & Company, 1922.

MLA (9th ed.) Citation

Quilter, Roger, and Robert Louis Stevenson. Two Songs. Novello & Company, 1922.