BLAKE ROBERT R. (1986). EXECUTIVE ACHIEVEMENNT MAKING IT AT THE TOP. MCGRAW-HILL.
Lua i Stíl Chicago (17ú heag.)BLAKE ROBERT R. EXECUTIVE ACHIEVEMENNT MAKING IT AT THE TOP. NEW YORK: MCGRAW-HILL, 1986.
Lua MLA (9ú heag.)BLAKE ROBERT R. EXECUTIVE ACHIEVEMENNT MAKING IT AT THE TOP. MCGRAW-HILL, 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.