Eichhorn, W. (1988). Measurement in economics: Theory and applications of economic indices. Physica-Verlag.
Lua i Stíl Chicago (17ú heag.)Eichhorn, Wolfgang. Measurement in Economics: Theory and Applications of Economic Indices. Heidelberg: Physica-Verlag, 1988.
Lua MLA (9ú heag.)Eichhorn, Wolfgang. Measurement in Economics: Theory and Applications of Economic Indices. Physica-Verlag, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.