How should I cite data in APA Style?
It depends on how you accessed the data; for example, if you retrieved the information from a journal article, book, web page, or a Statistics Canada publication, please use the appropriate formatting. If you retrieved the information from a data set, please see "How to Cite a Data Set in APA Style" from the APA Style Blog.
If you are citing data within a table - that is, you've created a table and retrieved the data within the table from various sources - please identify the sources of your information in the table note e.g. Data are from Smith, Brown, and West (1996), Winslow and Johnson (2014), and Yu et al. (2003). Use superscripted letters in the table data and with the corresponding mentions in the table note to make the connections: Data are from Smith, Brown, and West (1996)a, Winslow and Johnson (2014)b, and Yu et al. (2003)c. Please include the resources in your references, but you don’t need to include the superscripted letters in the references as those letters are only relevant within the table. See below for an example:
For more information and examples of citing data in a table, please see "Navigating Copyright: How to Cite Sources in a Table" (APA Style Blog).
One final point regarding data: remember that "data" is a plural noun.