Tolkien Society (England). Nigglings Smial, Lewis, A., & Ritchie, L. (1993). Niggling special publication. Nigglings.
Lua i Stíl Chicago (17ú heag.)Tolkien Society (England). Nigglings Smial, Alex Lewis, agus Lyn Ritchie. Niggling Special Publication. England: Nigglings, 1993.
Lua MLA (8ú heag.)Tolkien Society (England). Nigglings Smial, et al. Niggling Special Publication. Nigglings, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.