KUHN, B. (1988). Hardball: The education of a baseball commissioner. McGraw-Hill Bo. co.
Lua i Stíl Chicago (17ú heag.)KUHN, Bowie. Hardball: The Education of a Baseball Commissioner. New York: McGraw-Hill Bo. co, 1988.
Lua MLA (9ú heag.)KUHN, Bowie. Hardball: The Education of a Baseball Commissioner. McGraw-Hill Bo. co, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.