Sills, B. (1976). Bubbles: A self-portrait / by Beverly Sills. Bobbs-Merrill.
Lua i Stíl Chicago (17ú heag.)Sills, Beverly. Bubbles: A Self-portrait / by Beverly Sills. Indianapolis [u.a.]: Bobbs-Merrill, 1976.
Lua MLA (8ú heag.)Sills, Beverly. Bubbles: A Self-portrait / by Beverly Sills. Bobbs-Merrill, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.