Crawford, K. G. (1939). The pressure boys: The inside story of lobbying in America / by Kenneth G. Crawford (2. print.). Messner.
Lua i Stíl Chicago (17ú heag.)Crawford, Kenneth Gale. The Pressure Boys: The Inside Story of Lobbying in America / by Kenneth G. Crawford. 2. print. New York: Messner, 1939.
Lua MLA (8ú heag.)Crawford, Kenneth Gale. The Pressure Boys: The Inside Story of Lobbying in America / by Kenneth G. Crawford. 2. print. Messner, 1939.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.