Saint, W. S., & Goldsmith, W. W. (1979). Cropping systems, structural change and rural-urban migration in Brazil. Dept. of City and Regional Planning in conjunction with the program in Urban and Regional Studies, Cornell University.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Saint, William S., و William W. Goldsmith. Cropping Systems, Structural Change and Rural-urban Migration in Brazil. Ithaca, N.Y.: Dept. of City and Regional Planning in conjunction with the program in Urban and Regional Studies, Cornell University, 1979.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Saint, William S., و William W. Goldsmith. Cropping Systems, Structural Change and Rural-urban Migration in Brazil. Dept. of City and Regional Planning in conjunction with the program in Urban and Regional Studies, Cornell University, 1979.