BITTEL, L. R. (1964). Management By Exception Systematizing And Simplifying The Managerial Job Lester R. Bittel. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)BITTEL, Lester R. Management By Exception Systematizing And Simplifying The Managerial Job Lester R. Bittel. McGraw-Hill, 1964.
Lua MLA (8ú heag.)BITTEL, Lester R. Management By Exception Systematizing And Simplifying The Managerial Job Lester R. Bittel. McGraw-Hill, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.