Barreno, M. I. (1975). The three Marias: New Portuguese letters. Doubleday.
Lua i Stíl Chicago (17ú heag.)Barreno, Maria Isabel. The Three Marias: New Portuguese Letters. Garden City, N.Y: Doubleday, 1975.
Lua MLA (9ú heag.)Barreno, Maria Isabel. The Three Marias: New Portuguese Letters. Doubleday, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.