4/23/77
MLA
United States. Office of the White House Staff Secretary. "4/23/77." Jimmy Carter Library. 1977-04-23, https://www.jimmycarterlibrary.gov/digital_library/sso/148878/17/SSO_148878_017_06.pdf.
APA
United States. Office of the White House Staff Secretary (1977-04-23). 4/23/77. Retrieved from https://www.jimmycarterlibrary.gov/digital_library/sso/148878/17/SSO_148878_017_06.pdf
Chicago
United States. Office of the White House Staff Secretary. "4/23/77." 1977-04-23. July 3, 2025. https://www.jimmycarterlibrary.gov/digital_library/sso/148878/17/SSO_148878_017_06.pdf.