SCHILLER, B. R., TANSEY, M. M., & ZIEGLER, L. F. (1989). Study guide for the economy today.-- Ed.4. Random House.
Lua i Stíl Chicago (17ú heag.)SCHILLER, Bradley R., Michael M. TANSEY, agus Lawrence F. ZIEGLER. Study Guide for the Economy Today.-- Ed.4. New York: Random House, 1989.
Lua MLA (9ú heag.)SCHILLER, Bradley R., et al. Study Guide for the Economy Today.-- Ed.4. Random House, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.