BOYNE WALTER J. (1998). BEYOND THE HORIZONS: THE LOCKHEED STORY. ST.MARTIN`S PRESS.
Lua i Stíl Chicago (17ú heag.)BOYNE WALTER J. BEYOND THE HORIZONS: THE LOCKHEED STORY. NEW YORK: ST.MARTIN`S PRESS, 1998.
Lua MLA (9ú heag.)BOYNE WALTER J. BEYOND THE HORIZONS: THE LOCKHEED STORY. ST.MARTIN`S PRESS, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.