Lua APA (7ú heag.)

Porter Michael E. (1980). Competitve Strategy: Techniques for Analyzing Industries and Competitors. Free Press.

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (9ú heag.)

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

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.