Não informado. (1977). Informatics Abstracts. All-Union Institute of Scientific and Technical Information.
Lua i Stíl Chicago (17ú heag.)Não informado. Informatics Abstracts. Moscow: All-Union Institute of Scientific and Technical Information, 1977.
Lua MLA (8ú heag.)Não informado. Informatics Abstracts. All-Union Institute of Scientific and Technical Information, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.