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Research and Writing in International Relations: Roselle, Laura; Spray, Sharon; Shelton, Joel T.2020Roselle, L., Spray, S., & Shelton, J. T. (2020). Research and Writing in International Relations (3.ª ed.). New York: Routledge.
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Secundária
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Manual de Investigação em Ciências Sociais: Quivy, Raymond e Luc Van Campenhoudt2017Quivy, R., & Campenhoudt, L. V. (2017). Manual de Investigação em Ciências Sociais (7.ª ed.). Lisboa: Gradiva.
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