Lua APA (7ú heag.)
Carroll, R., & Viard, A. D. (2012). Progressive consumption taxation: The X tax revisited. AEI Press.
Lua i Stíl Chicago (17ú heag.)
Carroll, Robert, agus Alan D. Viard. Progressive Consumption Taxation: The X Tax Revisited. Washington, D.C.: AEI Press, 2012.
Lua MLA (9ú heag.)
Carroll, Robert, agus Alan D. Viard. Progressive Consumption Taxation: The X Tax Revisited. AEI Press, 2012.
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