BENT, R. J., & BENT, R. J. (1988). Business Basic Robert J. Bent; George C. Sethares. Wadsworth.
Lua i Stíl Chicago (17ú heag.)BENT, Robert J., agus Robert J. BENT. Business Basic Robert J. Bent; George C. Sethares. Wadsworth, 1988.
Lua MLA (8ú heag.)BENT, Robert J., agus Robert J. BENT. Business Basic Robert J. Bent; George C. Sethares. Wadsworth, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.