4/19/77
MLA
United States. Office of the White House Staff Secretary. "4/19/77." Jimmy Carter Library. 1977-04-19, https://www.jimmycarterlibrary.gov/digital_library/sso/148878/16/SSO_148878_016_04.pdf.
APA
United States. Office of the White House Staff Secretary (1977-04-19). 4/19/77. Retrieved from https://www.jimmycarterlibrary.gov/digital_library/sso/148878/16/SSO_148878_016_04.pdf
Chicago
United States. Office of the White House Staff Secretary. "4/19/77." 1977-04-19. July 3, 2025. https://www.jimmycarterlibrary.gov/digital_library/sso/148878/16/SSO_148878_016_04.pdf.