Cita APA (7th ed.)

Beethoven, L. v., & Kail, R. (1980). World's favorite classic & romantic piano duets: For one piano-four hands by Beethoven ... [et al.]. Ashley Pub.

Cita Chicago (17th ed.)

Beethoven, Ludwig van, i Robert Kail. World's Favorite Classic & Romantic Piano Duets: For One Piano-four Hands by Beethoven ... [et Al.]. New Jersey: Ashley Pub, 1980.

Cita MLA (9th ed.)

Beethoven, Ludwig van, i Robert Kail. World's Favorite Classic & Romantic Piano Duets: For One Piano-four Hands by Beethoven ... [et Al.]. Ashley Pub, 1980.