Online journal article

18. Author, “Title of Article,” Title of Journal volume, number (year): pages, URL.

Author. “Title of Article.” Title of Journal volume, number (year): pages. URL.

For online articles that have not been assigned a DOI include a URL.
Some online articles may not have page numbers.
Access dates are not required by Chicago in citations of formally published electronic sources (see Chicago Manual of Style, Ch.14.7).
If an access date is required (by publisher or discipline) they should immediately precede the URL, separated from the surrounding citation by commas in a note and periods in a bibliography entry.
In the bibliography (but not the footnotes), invert the name of the first author only (i.e. surname, given name).
Include both article title and subtitle, regardless of length.
Italicize the name of the journal.
Shortened citations for subsequent references to an online source follow the forms for printed books and journals.
In the bibliography, give the start and end pages of the article.
In footnotes, cite specific pages (unless you are referring to the whole article).
If a journal is paginated consecutively across a volume or if the month or season appears with the year, the issue number may be omitted.

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