Research Institute of Agricultural Economics & Popp, J. (2008). Studies in agricultural economics: No. 108.
Lua i Stíl Chicago (17ú heag.)Research Institute of Agricultural Economics agus Jozsef Popp. Studies in Agricultural Economics: No. 108. 2008.
Lua MLA (9ú heag.)Research Institute of Agricultural Economics agus Jozsef Popp. Studies in Agricultural Economics: No. 108. 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.