Pedro Castillo: The primary school teacher who became Peru's president. In: BBC News. 28. Juli 2021, abgerufen am 31. Juli 2021: „Casting himself as a man of the people, Mr Castillo was rarely seen without the traditional white, broad-rimmed hat of his Cajamarca region, and a huge inflatable pencil, the symbol of his Marxist Free Peru party which also represents his background in education.“