Frank Wu, D., & Schneider, F. (2019). Nonlinearity Between the Shadow Economy and Level of Development. International Monetary Fund.
Lua i Stíl Chicago (17ú heag.)Frank Wu, Dong, agus Friedrich Schneider. Nonlinearity Between the Shadow Economy and Level of Development. Washington, D.C.: International Monetary Fund, 2019.
Lua MLA (8ú heag.)Frank Wu, Dong, agus Friedrich Schneider. Nonlinearity Between the Shadow Economy and Level of Development. International Monetary Fund, 2019.
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