Allen, G. R. (1959). Agricultural marketing policies. B. Blackwell.
Lua i Stíl Chicago (17ú heag.)Allen, George Rollason. Agricultural Marketing Policies. Oxford: B. Blackwell, 1959.
Lua MLA (9ú heag.)Allen, George Rollason. Agricultural Marketing Policies. B. Blackwell, 1959.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.