Olsen, W. C. (1991). Agricultural economics and rural sociology: The contemporary core literature. Cornell Univ..
Lua i Stíl Chicago (17ú heag.)Olsen, Wallace C. Agricultural Economics and Rural Sociology: The Contemporary Core Literature. London: Cornell Univ., 1991.
Lua MLA (9ú heag.)Olsen, Wallace C. Agricultural Economics and Rural Sociology: The Contemporary Core Literature. Cornell Univ., 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.