Não informado. (1975). Agricultural Libraries Information Notes. Technical Information Systems, National Agricultural Library.
Chicago-referens (17:e uppl.)Não informado. Agricultural Libraries Information Notes. Beltsville, Md: Technical Information Systems, National Agricultural Library, 1975.
MLA-referens (8:e uppl.)Não informado. Agricultural Libraries Information Notes. Technical Information Systems, National Agricultural Library, 1975.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.