Gilbert, R. M. Hetty Gray.
Lua i Stíl Chicago (17ú heag.)Gilbert, Rosa M. Hetty Gray.
Lua MLA (9ú heag.)Gilbert, Rosa M. Hetty Gray.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)