articles from the library catalog, databases, and Google Scholar will usually provide a citation option, opt for Chicago Style that is consistent with your instructor's preferences
double-check your data, make sure authors’ names, titles of works, dates, and so forth are accurate and that they are entered in the approprate sequence
whether you are using footnotes or endnotes, citing is a a two-step process and entries need to be included in a bibliography
it is never sufficient to provide only a URL, a full citation is always needed
include a DOI (Digital Object Identifier) if possible, it provides a persistent URL to easily access an article
for example: Amy Verdun. "Political leadership of the European Central Bank." Journal of European Integration 39, no. :2, (2017): 207-221, https://doi.org/10.1080/07036337.2016.1277715.