MORRISON, D. Carl Sagan: The People’s Astronomer. AmeriQuests, [S. l.], v. 3, n. 2, 2006. DOI: 10.15695/amqst.v3i2.84. Disponível em: https://www.ameriquests.org/index.php/ameriquests/article/view/84. Acesso em: 17 oct. 2021.