Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

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