APA Citation

Koppel, C. d. July 20, 2019: Life in the 21st century. [s.n.].

Chicago Style Citation

Koppel, C.van de. July 20, 2019: Life in the 21st Century. [s.n.].

MLA Citation

Koppel, C.van de. July 20, 2019: Life in the 21st Century. [s.n.].

Warning: These citations may not always be 100% accurate.