Cunningham, I. C., & Cunningham, W. H. (1981). Marketing: A managerial approach. South- Western Publishing.
Παραπομπή Chicago StyleCunningham, Isabeller C., και William H. Cunningham. Marketing: A Managerial Approach. Chicago: South- Western Publishing, 1981.
Παραπομπή MLACunningham, Isabeller C., και William H. Cunningham. Marketing: A Managerial Approach. South- Western Publishing, 1981.
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