Barger, H. (1936). Foreign trade. V. Gollancz.
Lua i Stíl Chicago (17ú heag.)Barger, Harold. Foreign Trade. London: V. Gollancz, 1936.
Lua MLA (8ú heag.)Barger, Harold. Foreign Trade. V. Gollancz, 1936.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.