National Park Service's Marie Rust, Pennsylvania Lieutenant Governor Catherine Baker Knoll, and Secretary Gale Norton, left to right, at swearing-in ceremony for the Flight 93 National Memorial Federal Advisory Commission. Event was at the temporary memorial, near Shanksville, Pennsylvania, honoring the passengers and crew of the plane

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's Marie Rust, Pennsylvania Lieutenant Governor Catherine Baker Knoll, and Secretary Gale Norton, left to right, at swearing-in ceremony for the Flight 93 National Memorial Federal Advisory Commission. Event was at the temporary memorial, near Shanksville, Pennsylvania, honoring the passengers and crew of the plane. 2003-09-11. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/5616414. (Accessed December 19, 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, (2003-09-11) National Park Service's Marie Rust, Pennsylvania Lieutenant Governor Catherine Baker Knoll, and Secretary Gale Norton, left to right, at swearing-in ceremony for the Flight 93 National Memorial Federal Advisory Commission. Event was at the temporary memorial, near Shanksville, Pennsylvania, honoring the passengers and crew of the plane. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/5616414
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/5616414>.
Note: These citations are programmatically generated and may be incomplete.