Fletcher, J. (1984). Information Sources (Second Edition). ELSEVIER.
Lua i Stíl Chicago (17ú heag.)Fletcher, John. Information Sources (Second Edition). ELSEVIER, 1984.
Lua MLA (8ú heag.)Fletcher, John. Information Sources (Second Edition). ELSEVIER, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.