The statement you provided is a general observation about Apple Inc.'s business strategy and competitive advantages, rather than a direct quote from a specific source. It summarizes common themes found in business analyses, articles, and case studies focused on Apple. For example, many business journals, reports, and books on corporate strategy discuss Apple's emphasis on innovation, aesthetic product design, and the strong loyalty of its customer base as key factors contributing to its success.
If you are looking for specific publications or sources that analyze Apple's strategic competitiveness, consider looking at business strategy textbooks, Harvard Business Review articles, or industry analyses from firms such as Gartner or Forrester Research.