López-Menéndez, Marisol (2016). Miguel Pro: Martyrdom, Politics, and Society in Twentieth-Century Mexico. Lanham: Lexington Books. ISBN978-1-4985-0425-6. Consultado el 1 de marzo de 2023. «In addition, Cruz had time to stage the execution. This means only that their death was decided beforehand, attending to an imperative other than legal justice. Luis MacGregor obtained an amparo the momento he knew about the order […]».