Parkkari, J. (1977). Science and technology collections in Canadian government libraries: A guide. Canada Institute for Scientific and Technical Information, National Research Council of Canada.
Lua i Stíl Chicago (17ú heag.)Parkkari, John. Science and Technology Collections in Canadian Government Libraries: A Guide. Ottawa: Canada Institute for Scientific and Technical Information, National Research Council of Canada, 1977.
Lua MLA (8ú heag.)Parkkari, John. Science and Technology Collections in Canadian Government Libraries: A Guide. Canada Institute for Scientific and Technical Information, National Research Council of Canada, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.