Helm, E. E. (1989). Thematic catalogue of the works of Carl Philipp Emanuel Bach: E. Eugene Helm. Yale University Press.
Lua i Stíl Chicago (17ú heag.)Helm, E. Eugene. Thematic Catalogue of the Works of Carl Philipp Emanuel Bach: E. Eugene Helm. New Haven [u.a.]: Yale University Press, 1989.
Lua MLA (8ú heag.)Helm, E. Eugene. Thematic Catalogue of the Works of Carl Philipp Emanuel Bach: E. Eugene Helm. Yale University Press, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.