United Nations. Population Division. Dept. of Economic and Social Affairs. (2005). World population policies, 2005. Academic Foundation.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিUnited Nations. Population Division. Dept. of Economic and Social Affairs. World Population Policies, 2005. Academic Foundation, 2005.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিUnited Nations. Population Division. Dept. of Economic and Social Affairs. World Population Policies, 2005. Academic Foundation, 2005.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.