APA (7th ed.) Citation

Bach, C. P. E. (1971). Four little duets for two pianos. G. Schirmer.

Chicago Style (17th ed.) Citation

Bach, Carl Philipp Emanuel. Four Little Duets for Two Pianos. New York: G. Schirmer, 1971.

MLA (9th ed.) Citation

Bach, Carl Philipp Emanuel. Four Little Duets for Two Pianos. G. Schirmer, 1971.