APA ציטוט

Porter, M. E. (1980). Competitive strategy: Techniques for analyzing industries and competitors. Free Press.

Chicago Style (17th ed.) Citation

Porter, Michael E. Competitive Strategy: Techniques for Analyzing Industries and Competitors. New York: Free Press, 1980.

ציטוט MLA

Porter, Michael E. Competitive Strategy: Techniques for Analyzing Industries and Competitors. Free Press, 1980.