Ladd, Kevin L., e Bernard Spilka. “Prayer and Health Research: Proxies, Missed Targets, and Opportunities”. Revista Pistis & Praxis 6, no. 1 (setembro 13, 2014): 33–50. Acessado maio 5, 2024. https://periodicos.pucpr.br/pistispraxis/article/view/13028.