Haas, R. W. (1995). Business marketing: A managerial approach (6th ed.). South-Western College Pub.
Citace podle Chicago (17th ed.)Haas, Robert W. Business Marketing: A Managerial Approach. 6th ed. Cincinnati, Ohio: South-Western College Pub, 1995.
Citace podle MLA (9th ed.)Haas, Robert W. Business Marketing: A Managerial Approach. 6th ed. South-Western College Pub, 1995.
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