BURNS, E. M. (1949). The American social security system. Houghton Mifflin Company.
Lua i Stíl Chicago (17ú heag.)BURNS, Eveline M. The American Social Security System. Boston: Houghton Mifflin Company, 1949.
Lua MLA (9ú heag.)BURNS, Eveline M. The American Social Security System. Houghton Mifflin Company, 1949.
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