9/21/77
MLA
United States. Office of the White House Staff Secretary. "9/21/77." Jimmy Carter Library. 1977-09-21, https://www.jimmycarterlibrary.gov/digital_library/sso/148878/42/SSO_148878_042_05.pdf.
APA
United States. Office of the White House Staff Secretary (1977-09-21). 9/21/77. Retrieved from https://www.jimmycarterlibrary.gov/digital_library/sso/148878/42/SSO_148878_042_05.pdf
Chicago
United States. Office of the White House Staff Secretary. "9/21/77." 1977-09-21. July 7, 2025. https://www.jimmycarterlibrary.gov/digital_library/sso/148878/42/SSO_148878_042_05.pdf.
