Não informado. (1923). Farm economics. Cornell University, New York State College of Agriculture.
Lua i Stíl Chicago (17ú heag.)Não informado. Farm Economics. Ithaca, NY: Cornell University, New York State College of Agriculture, 1923.
Lua MLA (8ú heag.)Não informado. Farm Economics. Cornell University, New York State College of Agriculture, 1923.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.