Παραπομπή σε μορφή APA (7η εκδ.)

National Association of Purchasing Agents. (1964). Standardization manual ; a book of principles and practices for purchasing personnel (4th ed.). s.n.

Παραπομπή σε μορφή Chicago (17η εκδ.)

National Association of Purchasing Agents. Standardization Manual ; a Book of Principles and Practices for Purchasing Personnel. 4th ed. New York: s.n, 1964.

Παραπομπή σε μορφή MLA (9th εκδ.)

National Association of Purchasing Agents. Standardization Manual ; a Book of Principles and Practices for Purchasing Personnel. 4th ed. s.n, 1964.