ALM, L. R.; BURKHART, R. E. Differences That Matter: Canada, the United States and Environmental Policymaking. AmeriQuests, [S. l.], v. 3, n. 1, 2006. DOI: 10.15695/amqst.v3i1.49. Disponível em: https://ejournals.library.vanderbilt.edu/index.php/ameriquests/article/view/49. Acesso em: 28 sep. 2020.