Copland, A. (1989). Four early songs: For voice and piano / Aaron Copland. Boosey & Hawkes.
Lua i Stíl Chicago (17ú heag.)Copland, Aaron. Four Early Songs: For Voice and Piano / Aaron Copland. Bonn: Boosey & Hawkes, 1989.
Lua MLA (8ú heag.)Copland, Aaron. Four Early Songs: For Voice and Piano / Aaron Copland. Boosey & Hawkes, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.