Organization name. (Year). Title of report (Report No. xxx [if applicable]). Publisher. URL
World Health Organization. (2014). WHO guidance to protect health from climate change through health adaptation planning. https://www.who.int/publications/i/item/who-guidance-to-protect-health-from-climate-change-through-health-adaptation-planning
Note: When the publisher is the same as the author, which is often the case for group authors, omit the publisher.
Author, A. A. (Year). Title of report (Report No. xxx [if applicable]). Organization Name. URL
Copeland, M. E. (2005). Recovering your mental health: A self-help guide. U.S. Department of Health and Human Services. https://permanent.fdlp.gov/lps80208/SMA-3504.pdf