Start your citation with the title of the chart. It must have a proper title to be listed. The resource material should have a title listed with the chart you are referencing.
List the type of format. This means stating the type of document you are listing, which in this case would be "chart". Follow "chart" by a period. For example: Bedbug Infestations. Chart. New York: Time Magazine, 2007.
Follow the delineation of "chart" by the place of publication, usually by city. Follow this by a colon, followed by the publisher, as in: Bedbug Infestations. Chart. New York: Time Magazine, 2007.
Place a comma after the publisher and then list the copyright. This can be stated by just listing the year. For example: Bedbug Infestations. Chart. New York: Time Magazine, 2007.