ROI in Marketing: The Design Thinking Approach to Measure, Prove, and Improve the Value of MarketingEbookROI in Marketing: The Design Thinking Approach to Measure, Prove, and Improve the Value of MarketingbyJack J. PhillipsRating: 0 out of 5 stars0 ratingsSave ROI in Marketing: The Design Thinking Approach to Measure, Prove, and Improve the Value of Marketing for later