Ellis, Justin. "The Guardian’s next big thing: sidewalk billboards." Nieman Journalism Lab. Nieman Foundation for Journalism at Harvard, 4 Mar. 2013. Web. 23 Jul. 2024.
APA
Ellis, J. (2013, Mar. 4). The Guardian’s next big thing: sidewalk billboards. Nieman Journalism Lab. Retrieved July 23, 2024, from https://www.niemanlab.org/2013/03/the-guardians-next-big-thing-sidewalk-billboards/
Chicago
Ellis, Justin. "The Guardian’s next big thing: sidewalk billboards." Nieman Journalism Lab. Last modified March 4, 2013. Accessed July 23, 2024. https://www.niemanlab.org/2013/03/the-guardians-next-big-thing-sidewalk-billboards/.
Wikipedia
{{cite web
| url = https://www.niemanlab.org/2013/03/the-guardians-next-big-thing-sidewalk-billboards/
| title = The Guardian’s next big thing: sidewalk billboards
| last = Ellis
| first = Justin
| work = [[Nieman Journalism Lab]]
| date = 4 March 2013
| accessdate = 23 July 2024
| ref = {{harvid|Ellis|2013}}
}}
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