UN DESA — United Nations Department of Economic and Social Affairs Johnston, Chris 26 May 2017
Grolier- the new book of knowledge, section "E"• Sanger-Katz, Margot August 16, 2016 Bansal, Samarth November 30, 2016

قرن در فارسی

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مقابلة مع جيل ليبوفيتسكي العشرون: قرن
In 1960, buildings over 20 stories were still newsworthy; by the close of the decade, people were living in the sky
قرن در فارسی
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في اي قرن اختراع الهاتف؟
Partington, Richard August 13, 2018
CEO, Stephane Kasriel, Upwork October 31, 2018 "The misunderstood sixth mass extinction"
Khan, Ismail July 30, 2010 Carlson, Benjamin July 3, 2010

في أي قرن نحن الآن 2021

O'Neil, John; Onishi, Norimitsu October 15, 2006.

نحن في نهاية قرن الشيطان .. والخلافة قادمة قريبا
في أي قرن نحن الآن 2021
International Programs Center for Demographic and Economic Studies, U
قائمة السنوات
Fisher, Marc December 20, 2011