Original tekst: Mozart, Wolfgang Amadeus. Bischoff, Hans Publisher. New York. Piano Concerto No.21 in C major. K.467. 2 pianos 4 hands. ca.
Oversættelse: Piano Concerto No.21 i C-dur. 2 klaverer 4 hænder. G. Schirmer, No.662, n. CA. 1901. Plate 15779.
