Authors don’t commonly (or hardly ever) cite their sources, and don’t include things like a list of references at the end of the write-up. Bombas released in 2013 with two missions: to provide the "greatest socks while in the historical past of feet" and to donate socks to shelters https://paxtondrhnx.pointblog.net/hbr-case-study-analysis-an-overview-80041873