National Park Service Director Fran Mainella speaking at National Trails Day-related event at the Chesapeake and Ohio Canal National Historical Park in the Washington, D.C. area, marking the designation of 26 new national recreation trails in 16 states

Chicago citation style
Department of the Interior. National Business Center. Administrative Operations Directorate. Division of Employee and Public Services. Creative Communications Branch. Photographic Services. 2000-. National Park Service Director Fran Mainella speaking at National Trails Day-related event at the Chesapeake and Ohio Canal National Historical Park in the Washington, D.C. area, marking the designation of 26 new national recreation trails in 16 states. 2002-05-30. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/5610335. (Accessed June 23, 2018.)
APA citation style
Department of the Interior. National Business Center. Administrative Operations Directorate. Division of Employee and Public Services. Creative Communications Branch. Photographic Services. 2000-, (2002-05-30) National Park Service Director Fran Mainella speaking at National Trails Day-related event at the Chesapeake and Ohio Canal National Historical Park in the Washington, D.C. area, marking the designation of 26 new national recreation trails in 16 states. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/5610335
MLA citation style
Department of the Interior. National Business Center. Administrative Operations Directorate. Division of Employee and Public Services. Creative Communications Branch. Photographic Services. 2000-. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/5610335>.
Note: These citations are programmatically generated and may be incomplete.