Crump, T. (1981). The phenomenon of money. Routledge & Kegan Paul.
Lua i Stíl Chicago (17ú heag.)Crump, Thomas. The Phenomenon of Money. Londres ; Boston: Routledge & Kegan Paul, 1981.
Lua MLA (9ú heag.)Crump, Thomas. The Phenomenon of Money. Routledge & Kegan Paul, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.