United States. Bureau of the Census. (1980). International population dynamics, 1950-79: Demographic estimates for countries with a population of 5 million or more. The Bureau.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিUnited States. Bureau of the Census. International Population Dynamics, 1950-79: Demographic Estimates for Countries with a Population of 5 Million or More. Washington: The Bureau, 1980.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিUnited States. Bureau of the Census. International Population Dynamics, 1950-79: Demographic Estimates for Countries with a Population of 5 Million or More. The Bureau, 1980.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.