10. "Será hoje o lançamento nacional do PT, às 17 h."A Provincia, (1980 January 10).

10. "Será hoje o lançamento nacional do PT, às 17 h."A Provincia, (1980 January 10)., Box: 16. Eduardo Sarno Collection of Leftist Movements in Brazil, 2002-03. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/373886 Accessed September 26, 2026.