Clifford, L. (1975). National scientific and technical information coordinating organisations: A comparative survey. Institute for Industrial Research and Standards.
Chicago-referens (17:e uppl.)Clifford, Liam. National Scientific and Technical Information Coordinating Organisations: A Comparative Survey. [Dublin]: Institute for Industrial Research and Standards, 1975.
MLA-referens (9:e uppl.)Clifford, Liam. National Scientific and Technical Information Coordinating Organisations: A Comparative Survey. Institute for Industrial Research and Standards, 1975.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.