APA (7th ed.) Citation

Firnkees, G. (1992). Technical and musical exercises for the piano music of the 20th century. Leidorf.

Chicago Style (17th ed.) Citation

Firnkees, Gertrud. Technical and Musical Exercises for the Piano Music of the 20th Century. Buch (Erlbach): Leidorf, 1992.

MLA (9th ed.) Citation

Firnkees, Gertrud. Technical and Musical Exercises for the Piano Music of the 20th Century. Leidorf, 1992.

Warning: These citations may not always be 100% accurate.