Não informado. (1907). Proceedings of the American Society of Agronomy. American Society of Agronomy.
Lua i Stíl Chicago (17ú heag.)Não informado. Proceedings of the American Society of Agronomy. Washington: American Society of Agronomy, 1907.
Lua MLA (8ú heag.)Não informado. Proceedings of the American Society of Agronomy. American Society of Agronomy, 1907.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.