Não informado. (1974). Journal of Purchasing and Materials Management. National Association of Purchasing Management.
Chicago-viite (17. p.)Não informado. Journal of Purchasing and Materials Management. Oradell, NJ: National Association of Purchasing Management, 1974.
MLA-viite (8. p.)Não informado. Journal of Purchasing and Materials Management. National Association of Purchasing Management, 1974.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.