4/13/78
MLA
United States. Office of the White House Staff Secretary. "4/13/78." Jimmy Carter Library. 1978-04-13, https://www.jimmycarterlibrary.gov/digital_library/sso/148878/71/SSO_148878_071_04.pdf.
APA
United States. Office of the White House Staff Secretary (1978-04-13). 4/13/78. Retrieved from https://www.jimmycarterlibrary.gov/digital_library/sso/148878/71/SSO_148878_071_04.pdf
Chicago
United States. Office of the White House Staff Secretary. "4/13/78." 1978-04-13. August 4, 2025. https://www.jimmycarterlibrary.gov/digital_library/sso/148878/71/SSO_148878_071_04.pdf.