"Public Opinion Survey Residents of the Autonomous Republic of Crimea" (PDF)., The sample consisted of 1,200 permanent Crimea residents older than the age of 18 and eligible to vote and is representative of the general population by age, gender, education and religion.
تمت أرشفته من الأصل (PDF) في 10 أكتوبر 2017.  الوسيط |تاريخ الأرشيف= تم تجاهله (مساعدة); الوسيط |مسار الأرشيف= تم تجاهله (مساعدة); تحقق من التاريخ في: |archive-date= (مساعدة), The sample consisted of 1,200 permanent Crimea residents older than the age of 18 and eligible to vote and is representative of the general population by age, gender, education and religion.