Note: Look under the Source section for “Survey by” -- that is the author
Daniel Research Group. (2019, September). Unit shipments of mobile personal computers (PCs) and laptops in the United States, from 2013 to 2023 (in millions) [Chart]. Statista. https://www.statista.com/
Anything without a named author:
Statista. (2020, May). Laptops & tablets [Consumer market outlook]. https://www.statista.com/
Armstrong, M. (2020, June 4). UK government approval on the slide [Infographic]. Statista. https://www.statista.com/