BITTEL LESTER R. (1985). HANDBOOK FOR PROFESSIONAL MANAGERS. MCGRAW-HILL.
Lua i Stíl Chicago (17ú heag.)BITTEL LESTER R. HANDBOOK FOR PROFESSIONAL MANAGERS. NEW YORK: MCGRAW-HILL, 1985.
Lua MLA (9ú heag.)BITTEL LESTER R. HANDBOOK FOR PROFESSIONAL MANAGERS. MCGRAW-HILL, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.