APA (7th ed.) Citation

Kohler, L., Oesterle, L., & Baker, T. (1908). Practical method for the piano, op. 300. Schirmer.

Chicago Style (17th ed.) Citation

Kohler, Louis, Louis Oesterle, and Theodore Baker. Practical Method for the Piano, Op. 300. New York: Schirmer, 1908.

MLA (9th ed.) Citation

Kohler, Louis, et al. Practical Method for the Piano, Op. 300. Schirmer, 1908.