Mayer, W. G., & Busch, A. (2004). The front-loading problem in presidential nominations. Brookings Institution Press.
Lua i Stíl Chicago (17ú heag.)Mayer, William G., agus Andrew Busch. The Front-loading Problem in Presidential Nominations. Washington, D.C: Brookings Institution Press, 2004.
Lua MLA (9ú heag.)Mayer, William G., agus Andrew Busch. The Front-loading Problem in Presidential Nominations. Brookings Institution Press, 2004.
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