APA (7th ed.) Citation

Schumann, R. A. (1991). Complete works for piano 4-hands. Essex Entertainment.

Chicago Style (17th ed.) Citation

Schumann, Robert Alexander. Complete Works for Piano 4-hands. [S.l.]: Essex Entertainment, 1991.

MLA (9th ed.) Citation

Schumann, Robert Alexander. Complete Works for Piano 4-hands. Essex Entertainment, 1991.