Lewis, R., & Stewart, R. (1961). The managers: A new examination of the English, German and American executive. New American Library.
Lua i Stíl Chicago (17ú heag.)Lewis, Roy, agus Rosemary Stewart. The Managers: A New Examination of the English, German and American Executive. N. Y: New American Library, 1961.
Lua MLA (9ú heag.)Lewis, Roy, agus Rosemary Stewart. The Managers: A New Examination of the English, German and American Executive. New American Library, 1961.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.