Jones, L. L., & Bertschi, L. (1930). General business science. Gregg Pub. Co..
Lua i Stíl Chicago (17ú heag.)Jones, Lloyd Llewellyn, agus Lloyd Bertschi. General Business Science. New York, Boston [etc.]: Gregg Pub. Co., 1930.
Lua MLA (8ú heag.)Jones, Lloyd Llewellyn, agus Lloyd Bertschi. General Business Science. Gregg Pub. Co., 1930.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.