4/13/77
MLA
United States. Office of the White House Staff Secretary. "4/13/77." Jimmy Carter Library. 1977-04-13, https://www.jimmycarterlibrary.gov/digital_library/sso/148878/15/SSO_148878_015_01.pdf.
APA
United States. Office of the White House Staff Secretary (1977-04-13). 4/13/77. Retrieved from https://www.jimmycarterlibrary.gov/digital_library/sso/148878/15/SSO_148878_015_01.pdf
Chicago
United States. Office of the White House Staff Secretary. "4/13/77." 1977-04-13. July 3, 2025. https://www.jimmycarterlibrary.gov/digital_library/sso/148878/15/SSO_148878_015_01.pdf.