Carver, J. S. (1976). Systems of demographic measurement: The dual record system. International Program of Laboratories for Population Statistics, Dept. of Biostatistics, Carolina Population Center, University of North Carolina at Chapel Hill.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিCarver, Jane S. Systems of Demographic Measurement: The Dual Record System. Chapel Hill: International Program of Laboratories for Population Statistics, Dept. of Biostatistics, Carolina Population Center, University of North Carolina at Chapel Hill, 1976.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিCarver, Jane S. Systems of Demographic Measurement: The Dual Record System. International Program of Laboratories for Population Statistics, Dept. of Biostatistics, Carolina Population Center, University of North Carolina at Chapel Hill, 1976.