Cita APA (7a ed.)

Anderson, J. E., & Wincoop, E. v. (2001). Gravity with gravitas: A solution to the border puzzle. National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Anderson, James E., y Eric van Wincoop. Gravity with Gravitas: A Solution to the Border Puzzle. Cambridge, MA: National Bureau of Economic Research, 2001.

Cita MLA (9a ed.)

Anderson, James E., y Eric van Wincoop. Gravity with Gravitas: A Solution to the Border Puzzle. National Bureau of Economic Research, 2001.