DUIVENVOORDEN, E. Niek Pas, Provo! Mediafenomeen 1965-1967. BMGN - Low Countries Historical Review, [S. l.], v. 131, n. 3, 2016. DOI: 10.18352/bmgn-lchr.10240. Disponível em: https://bmgn-lchr.nl/article/view/6487. Acesso em: 22 oct. 2021.