Charlotte Zolotow. (1990). Big Sister and Little Sister (First Edition.). HarperCollins.
Lua i Stíl Chicago (17ú heag.)Charlotte Zolotow. Big Sister and Little Sister. First Edition. HarperCollins, 1990.
Lua MLA (9ú heag.)Charlotte Zolotow. Big Sister and Little Sister. First Edition. HarperCollins, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.