Παραπομπή APA

C.M. Business pub. Inc. (1915). Purchasing. C.M. Business pub. Inc.

Παραπομπή Chicago Style

C.M. Business pub. Inc. Purchasing. Boston: C.M. Business pub. Inc, 1915.

Παραπομπή MLA

C.M. Business pub. Inc. Purchasing. C.M. Business pub. Inc, 1915.