FEMA's first-ever Data Town Hall featured five challenge tracks to move specific projects forward. One such track was developing an interactive application programming interface (API) explorer, building off FEMA's API to utilize the agency's publicly available data

Chicago citation style
Department of Homeland Security. Federal Emergency Management Agency. Public Affairs Division. 3/1/2003. FEMA's first-ever Data Town Hall featured five challenge tracks to move specific projects forward. One such track was developing an interactive application programming interface (API) explorer, building off FEMA's API to utilize the agency's publicly available data. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/24482889. (Accessed November 14, 2018.)
APA citation style
Department of Homeland Security. Federal Emergency Management Agency. Public Affairs Division. 3/1/2003, FEMA's first-ever Data Town Hall featured five challenge tracks to move specific projects forward. One such track was developing an interactive application programming interface (API) explorer, building off FEMA's API to utilize the agency's publicly available data. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/24482889
MLA citation style
Department of Homeland Security. Federal Emergency Management Agency. Public Affairs Division. 3/1/2003. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/24482889>.
Note: These citations are programmatically generated and may be incomplete.