Bown, Chad P.; Irwin, Douglas A. (december 2015). "The GATT's Starting Point: Tariff Levels circa 1947". NBER Working Paper No. 21782. doi:10.3386/w21782.
Irwin, Douglas A. (2007-04-09). "GATT Turns 60". Wall Street Journal (engelsk). ISSN0099-9660. Arkiveret fra originalen 6. november 2018. Hentet 2017-10-28.
Irwin, Douglas A. (2007-04-09). "GATT Turns 60". Wall Street Journal (engelsk). ISSN0099-9660. Arkiveret fra originalen 6. november 2018. Hentet 2017-10-28.
wsj.com
Irwin, Douglas A. (2007-04-09). "GATT Turns 60". Wall Street Journal (engelsk). ISSN0099-9660. Arkiveret fra originalen 6. november 2018. Hentet 2017-10-28.