13. "Cinco deputados estaduais paulistas aderem ao PT."O Liberal, (1980 February 10).

13. "Cinco deputados estaduais paulistas aderem ao PT."O Liberal, (1980 February 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/373889 Accessed September 26, 2026.