Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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