Gagliardo, D. (1949). American social insurance. Harper.
Lua i Stíl Chicago (17ú heag.)Gagliardo, Domenico. American Social Insurance. New York: Harper, 1949.
Lua MLA (9ú heag.)Gagliardo, Domenico. American Social Insurance. Harper, 1949.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.