Freivalds, J. (1985). Successful agribusiness management. Gower.
Lua i Stíl Chicago (17ú heag.)Freivalds, John. Successful Agribusiness Management. England: Gower, 1985.
Lua MLA (9ú heag.)Freivalds, John. Successful Agribusiness Management. Gower, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.