REHMAN, Yasir. Difference between Quantitative and Qualitative Research Question- PICO vs. SPIDER. American Scientific Research Journal for Engineering, Technology, and Sciences, Jordan, v. 77, n. 1, p. 188–199, 2021. Disponível em: https://www.asrjetsjournal.org/American_Scientific_Journal/article/view/6730. Acesso em: 21 sep. 2025.