Campbell, K., y E. Wiggins. «Editorial Advocacy Frames Explanatory Model: An Analysis of Newspapers Withdrawing from Presidential Endorsements». Sur Le Journalisme, About Journalism, Sobre Jornalismo, vol. 5, n.º 2, enero de 2017, pp. 120-33, doi:10.25200/SLJ.v5.n2.2016.175.