Freyre, G. (1961). Portuguese integration in the tropics: Notes concerning a possible Lusotropicology which would specialize in the systematic study of the ecological-social process of the integration in tropical environments of Portuguese, descendants of Portuguese and continuators of Portuguese. s. n.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Freyre, Gilbert. Portuguese Integration in the Tropics: Notes Concerning a Possible Lusotropicology Which Would Specialize in the Systematic Study of the Ecological-social Process of the Integration in Tropical Environments of Portuguese, Descendants of Portuguese and Continuators of Portuguese. Lisbon: s. n, 1961.
Trích dẫn kiểu MLA (xuất bản lần thứ 9)Freyre, Gilbert. Portuguese Integration in the Tropics: Notes Concerning a Possible Lusotropicology Which Would Specialize in the Systematic Study of the Ecological-social Process of the Integration in Tropical Environments of Portuguese, Descendants of Portuguese and Continuators of Portuguese. s. n, 1961.