Chelius, Chad (Nombre personal)

Mac OS X Snow Leopard digital classroom, 2009: portada (Chad Chelius)

Learn Adobe Illustrator CC for graphic design and illustration, 2019: portada (Chad Chelius)

VIAF, sitio web, 19 diciembre de 2023: (puntos de acceso: Chelius, Chad) https://viaf.org/viaf/103065717/#Chelius,_Chad