HEATH, Eugene F. Two Cheers and a Pint of Worry: An On-Line Course in Political and Social Philosophy. Online Learning, Boston, MA, v. 2, n. 1, 2019. DOI: 10.24059/olj.v2i1.1927. Disponível em: https://olj.onlinelearningconsortium.org/index.php/olj/article/view/1927. Acesso em: 25 mar. 2026.