Holland, Jonathan (18 de octubre de 2018). «Petra: Film Review». www.hollywoodreporter.com. Consultado el 13 de abril de 2019. «If such a notion suggests that we are in ancient Greece rather than modern Catalonia, then that’s exactly right: The concerns of Petra are the universal ones of Greek tragedy, updated to contemporary Spain, and it’s from Greek tragedy that the tight, complex plotting, the timelessness and the air of impending doom that hangs over Petra are drawn.»
Weissberg, Jay (10 de mayo de 2018). «Film Review: Petra». variety.com. Consultado el 13 de abril de 2019. «Yet at a certain point, the plot twists feel gratuitous, and Rosales’ enduring interest in the subtleties of family dynamics veers toward themes found in Greek tragedy, without their bald immediacy.»
