APA (7th ed.) Citation

Köhler, E. (1964). 12 moderately difficult exercises: For flute : op. 33, book II. Southern Music Co..

Chicago Style (17th ed.) Citation

Köhler, Ernesto. 12 Moderately Difficult Exercises: For Flute : Op. 33, Book II. San Antonio, Texas: Southern Music Co., 1964.

MLA (9th ed.) Citation

Köhler, Ernesto. 12 Moderately Difficult Exercises: For Flute : Op. 33, Book II. Southern Music Co., 1964.