Burbidge, N., Gray, P., & Levy, S. Letters (2a ed.).
Lua i Stíl Chicago (17ú heag.)Burbidge, Nicky, Peta Gray, agus Sheila Levy. Letters. 2a ed.
Lua MLA (8ú heag.)Burbidge, Nicky, et al. Letters. 2a ed.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.