Final answer:
To cite a source with multiple authors in Chicago style, list the authors in the order they appear on the title page, using commas to separate each author's name and an ampersand before the last author's name.
Step-by-step explanation:
In Chicago style, when citing a source with multiple authors, list the authors in the order they appear on the title page. Use commas to separate each author's name and an ampersand before the last author's name. For example, if the source has three authors, the citation would look like this: Lastname1, Firstname1, Lastname2, Firstname2, & Lastname3, Firstname3.
If the source has more than three authors, list the first author followed by 'et al.' For example: Lastname1, Firstname1, et al.
Each entry should begin at the left margin, with subsequent lines indented one-half inch, forming a 'hanging indent'. Entries should be double-spaced and alphabetized by the authors' last names. Use initials to differentiate authors with the same last name.