McClelland, D. C., & Winter, D. G. (1969). Motivating economic achievement. Free Press.
Lua i Stíl Chicago (17ú heag.)McClelland, David Clarence, agus David G. Winter. Motivating Economic Achievement. New York: Free Press, 1969.
Lua MLA (9ú heag.)McClelland, David Clarence, agus David G. Winter. Motivating Economic Achievement. Free Press, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.