7/31/77
MLA
United States. Office of the White House Staff Secretary. "7/31/77." Jimmy Carter Library. 1977-07-31, https://www.jimmycarterlibrary.gov/digital_library/sso/148878/34/SSO_148878_034_06.pdf.
APA
United States. Office of the White House Staff Secretary (1977-07-31). 7/31/77. Retrieved from https://www.jimmycarterlibrary.gov/digital_library/sso/148878/34/SSO_148878_034_06.pdf
Chicago
United States. Office of the White House Staff Secretary. "7/31/77." 1977-07-31. July 6, 2025. https://www.jimmycarterlibrary.gov/digital_library/sso/148878/34/SSO_148878_034_06.pdf.