MLA
WYCO Colour Productions (Ambler, Pa.). Dr. Martin Luther King, Jr. : as he spoke his never-to-be-forgotten words at the Freedom March to Washington, D.C., on August 28, 1963 - I have a dream. August 28, 1963. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/576rxwdbw9-cor.
APA, 6th edition
WYCO Colour Productions (Ambler, Pa.). (August 28, 1963)[Dr. Martin Luther King, Jr. : as he spoke his never-to-be-forgotten words at the Freedom March to Washington, D.C., on August 28, 1963 - I have a dream]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/576rxwdbw9-cor.
Chicago
WYCO Colour Productions (Ambler, Pa.), Dr. Martin Luther King, Jr. : as he spoke his never-to-be-forgotten words at the Freedom March to Washington, D.C., on August 28, 1963 - I have a dream, August 28, 1963, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/576rxwdbw9-cor.