Cite
Alabama state troopers in gas masks and riot gear, waiting for civil rights marchers on the south side of the Edmund Pettus Bridge in Selma, Alabama, on Bloody Sunday.
MLA
Martin, Spider. "Alabama state troopers in gas masks and riot gear, waiting for civil rights marchers on the south side of the Edmund Pettus Bridge in Selma, Alabama, on Bloody Sunday.." Alabama. Department of Archives and History. 1965-03-07, http://digital.archives.alabama.gov/cdm/ref/collection/amg/id/36024.
APA
Martin, Spider (1965-03-07). Alabama state troopers in gas masks and riot gear, waiting for civil rights marchers on the south side of the Edmund Pettus Bridge in Selma, Alabama, on Bloody Sunday.. Retrieved from http://digital.archives.alabama.gov/cdm/ref/collection/amg/id/36024
Chicago
Martin, Spider. "Alabama state troopers in gas masks and riot gear, waiting for civil rights marchers on the south side of the Edmund Pettus Bridge in Selma, Alabama, on Bloody Sunday.." 1965-03-07. May 5, 2024. http://digital.archives.alabama.gov/cdm/ref/collection/amg/id/36024.