de Rossi, Martino (c. 1460). "Ch. 2 § Maccaroni romaneschi". Libro de Arte Coquinaria. Retrieved 26 May 2024. Original manuscript scan available on the Library of Congress, relevant section on page 39.
Owen, June (26 June 1957). "Food; Three Restaurants". The New York Times. p. 48. Fettuccine Alfredo, originated at the famous Alfredo's in Rome, is another specialty ($1.65).
de Rossi, Martino (c. 1460). "Ch. 2 § Maccaroni romaneschi". Libro de Arte Coquinaria. Retrieved 26 May 2024. Original manuscript scan available on the Library of Congress, relevant section on page 39.