Hammonds, C., Woods, R. H., & Gregory, R. W. (1938). Today's agriculture. J.B. Lippincott company.
Lua i Stíl Chicago (17ú heag.)Hammonds, Carsie, Ralph H. Woods, agus R. W. Gregory. Today's Agriculture. Chicago, Philadelphia [etc.]: J.B. Lippincott company, 1938.
Lua MLA (8ú heag.)Hammonds, Carsie, et al. Today's Agriculture. J.B. Lippincott company, 1938.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.