Kaufmann, W. W. (1992). Assessing the base force: How much is too muchn. Brookings Institution.
Lua i Stíl Chicago (17ú heag.)Kaufmann, William W. Assessing the Base Force: How Much Is Too Muchn. Washington: Brookings Institution, 1992.
Lua MLA (9ú heag.)Kaufmann, William W. Assessing the Base Force: How Much Is Too Muchn. Brookings Institution, 1992.
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