Παραπομπή APA
National Association of Purchasing Management. (1991). International journal of purchasing and materials management. Tempe, Ariz.: National Association of Purchasing Management, Inc..
Παραπομπή Chicago StyleNational Association of Purchasing Management. International Journal of Purchasing and Materials Management. Tempe, Ariz.: National Association of Purchasing Management, Inc., 1991.
Παραπομπή MLANational Association of Purchasing Management. International Journal of Purchasing and Materials Management. Tempe, Ariz.: National Association of Purchasing Management, Inc., 1991.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.