Bird, H. S. (1919). Important factors in the inter-state transportation of fruits and vegetables.
Lua i Stíl Chicago (17ú heag.)Bird, Harold Sterling. Important Factors in the Inter-state Transportation of Fruits and Vegetables. 1919.
Lua MLA (8ú heag.)Bird, Harold Sterling. Important Factors in the Inter-state Transportation of Fruits and Vegetables. 1919.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.