Não informado. (1971). NLL Announcement Bulletin. National Lending Library for Science and Technology.
Lua i Stíl Chicago (17ú heag.)Não informado. NLL Announcement Bulletin. Boston, Inglaterra: National Lending Library for Science and Technology, 1971.
Lua MLA (8ú heag.)Não informado. NLL Announcement Bulletin. National Lending Library for Science and Technology, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.