1. Freedom of Expression in the Digital Age: A Historian’s Perspective John, Richard R. 2019 Articles Freedom of expressionSocial mediaCommunication and technologyCivil rightsHistory
2. PEN International and its Republic of Letters, 1921-1970 Doherty, Megan 2011 Theses HistoryHumanismLiterature--Societies, etc.Freedom of expressionCold War (1945-1989)PEN (Organization)