Cita APA (7a ed.)

Piggott, J., & Whalley, J. (1998). VAT base broadening, self supply, and the informal sector. National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Piggott, John, y John Whalley. VAT Base Broadening, Self Supply, and the Informal Sector. Cambridge, MA: National Bureau of Economic Research, 1998.

Cita MLA (9a ed.)

Piggott, John, y John Whalley. VAT Base Broadening, Self Supply, and the Informal Sector. National Bureau of Economic Research, 1998.