Diffie, Bailey W.; Freyre, Gilberto; Putnam, Samuel «The Masters and the Slaves [Casa-Grande & Senzala: A Study in the Development of Brazilian Civilization.]». The Hispanic American Historical Review, 26, 4, 11-1946, pàg. 497. Arxivat de l'original el 2022-02-13. DOI: 10.2307/2507653 [Consulta: 13 febrer 2022].
Diffie, Bailey W.; Freyre, Gilberto; Putnam, Samuel «The Masters and the Slaves [Casa-Grande & Senzala: A Study in the Development of Brazilian Civilization.]». The Hispanic American Historical Review, 26, 4, 11-1946, pàg. 497. Arxivat de l'original el 2022-02-13. DOI: 10.2307/2507653 [Consulta: 13 febrer 2022].
Diffie, Bailey W.; Freyre, Gilberto; Putnam, Samuel «The Masters and the Slaves [Casa-Grande & Senzala: A Study in the Development of Brazilian Civilization.]». The Hispanic American Historical Review, 26, 4, 11-1946, pàg. 497. Arxivat de l'original el 2022-02-13. DOI: 10.2307/2507653 [Consulta: 13 febrer 2022].