Einzig, P. (1966). Primitive Money (Second Edition). ELSEVIER.
Lua i Stíl Chicago (17ú heag.)Einzig, Paul. Primitive Money (Second Edition). ELSEVIER, 1966.
Lua MLA (8ú heag.)Einzig, Paul. Primitive Money (Second Edition). ELSEVIER, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.