International trade is the exchange of good and services between countries.
Cowen, Tyler & Alex Tabarrok (2020) International trade, Marginal Revolution University.
Gopinath, Gita, Elhanan Helpman & Kenneth Rogoff (eds.) (2014) Handbook of International Economics, vol. 4, Amsterdam: Elsevier.
Wonnacott, Paul (1998) International trade, Britannica, July 20 (updated 11 November 2020).