左翼ブロック
↑ Bloco de Esquerda comemora décimo aniversário
↑ “Risque pays du Portugal : Politique” (French). Société Générale. 2019年5月11日閲覧。
↑ “Portugal - Political Parties - Elections” (French). perspective.usherbrooke.ca. 2019年5月11日閲覧。
↑ Cunha, Carlos (2008). Few but Pure and Good Members are Preferred to a Mass Party — The Portuguese Communist Party's Continued Orthodoxy. p. 197. https://ciencia.iscte-iul.