APA (7th ed.) Citation

De Koven, R. (1919). Robin Hood: Comic opera in 3 acts. G. Schirmer.

Chicago Style (17th ed.) Citation

De Koven, Reginald. Robin Hood: Comic Opera in 3 Acts. New York: G. Schirmer, 1919.

MLA (9th ed.) Citation

De Koven, Reginald. Robin Hood: Comic Opera in 3 Acts. G. Schirmer, 1919.