Maas, P. (1973). Serpico. Bantam Books.
Lua i Stíl Chicago (17ú heag.)Maas, Peter. Serpico. New York: Bantam Books, 1973.
Lua MLA (8ú heag.)Maas, Peter. Serpico. Bantam Books, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.