APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.