APA (7th ed.) Citation

Wolf, H., Heyse, P., & Geibel, E. (1989). Spanish and Italian songbooks. Dover.

Chicago Style (17th ed.) Citation

Wolf, Hugo, Paul Heyse, and Emanuel Geibel. Spanish and Italian Songbooks. New York: Dover, 1989.

MLA (9th ed.) Citation

Wolf, Hugo, et al. Spanish and Italian Songbooks. Dover, 1989.