Não informado. (1975). Agricultural Libraries Information Notes. Technical Information Systems, National Agricultural Library.
Chicago-viite (17. p.)Não informado. Agricultural Libraries Information Notes. Beltsville, Md: Technical Information Systems, National Agricultural Library, 1975.
MLA-viite (8. p.)Não informado. Agricultural Libraries Information Notes. Technical Information Systems, National Agricultural Library, 1975.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.