Martin, R. A., & il. R. Freund, J. I. (1969). As borboletas. Verbo.
Lua i Stíl Chicago (17ú heag.)Martin, Richard A., agus J.G. Irving il. R. Freund. As Borboletas. Verbo, 1969.
Lua MLA (8ú heag.)Martin, Richard A., agus J.G. Irving il. R. Freund. As Borboletas. Verbo, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.