Clifford, L. (1975). National scientific and technical information coordinating organisations: A comparative survey. Institute for Industrial Research and Standards.
Cita Chicago (17th ed.)Clifford, Liam. National Scientific and Technical Information Coordinating Organisations: A Comparative Survey. [Dublin]: Institute for Industrial Research and Standards, 1975.
Cita MLA (9th ed.)Clifford, Liam. National Scientific and Technical Information Coordinating Organisations: A Comparative Survey. Institute for Industrial Research and Standards, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.