MacClelland, D. C. (1967). The achieving society. The Free Press [u.a.].
Lua i Stíl Chicago (17ú heag.)MacClelland, David Clarence. The Achieving Society. New York [u.a.]: The Free Press [u.a.], 1967.
Lua MLA (8ú heag.)MacClelland, David Clarence. The Achieving Society. The Free Press [u.a.], 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.