Citing Reports
In this context, a "report" is a document created by an organization such as a think tank, policy organization, or a government agency. Many resources in policy studies come from such organizations.
Reports are essentially treated like books in Chicago Author-Date Style (see Section 14 of the Chicago Manual of Style on "Pamphlets, reports, and the like" at http://www.chicagomanualofstyle.org/16/ch14/ch14_sec249.html).
Example 1: Report that lists people as authors
In-text:
(Alvarado et al. 2014)
Bibliography:
Alvarado, Alex, Matthew Rae, Gary Claxton, and Larry Levitt. 2014. Examining Private Exchanges in the Employer-Sponsored Insurance Market. Menlo Park, CA.: The Henry J. Kaiser Family Foundation. Accessed February 15, 2015. http://kff.org/private-insurance/report/examining-private-exchanges-in-the-employer-sponsored-insurance-market/
Example 2: Report with no people listed as authors; "organization as author"
In-text:
(City of Norfolk Department of Public Works 2014)
Bibliography:
City of Norfolk Department of Public Works. Operations Division. Environmental Stormwater Management. 2014. Combined Coastal & Precipitation Flooding Master Plan. Norfolk, VA.: City of Norfolk Department of Public Works. Accessed March 22, 2022. https://www.norfolk.gov/DocumentCenter/View/32545/Combined-Coastal-and-Precipitation-Flooding-Master-Plan?bidId