Hall, J. O., & Klinger, R. E. (1957). Problem solving in our American democracy. American Book Co.
Lua i Stíl Chicago (17ú heag.)Hall, John Oliver, agus Russell E. Klinger. Problem Solving in Our American Democracy. [New York]: American Book Co, 1957.
Lua MLA (8ú heag.)Hall, John Oliver, agus Russell E. Klinger. Problem Solving in Our American Democracy. American Book Co, 1957.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.