Lerner, A. P. (1949). The Myth of the Parasitic Middleman: "Productive" and "Unproductive" Labor.
Lua i Stíl Chicago (17ú heag.)Lerner, Abba P. The Myth of the Parasitic Middleman: "Productive" and "Unproductive" Labor. New York, 1949.
Lua MLA (8ú heag.)Lerner, Abba P. The Myth of the Parasitic Middleman: "Productive" and "Unproductive" Labor. 1949.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.