Organisation of Islamic Conference & Statistical, Economic, and Social Research and Training Centre for Islamic Countries. (1989). Yearbook of socio-economic indicators of the OIC member countries. Statistical, Economic, and Social Research and Training Centre for Islamic Countries.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Organisation of Islamic Conference و Economic Statistical. Yearbook of Socio-economic Indicators of the OIC Member Countries. Ankara: Statistical, Economic, and Social Research and Training Centre for Islamic Countries, 1989.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Organisation of Islamic Conference و Economic Statistical. Yearbook of Socio-economic Indicators of the OIC Member Countries. Statistical, Economic, and Social Research and Training Centre for Islamic Countries, 1989.