Shields, H. G., & Wilson, W. H. (1936). Workbook for use with Business-economic problems. South-western Publishing Co..
Lua i Stíl Chicago (17ú heag.)Shields, Harold Gustav, agus William Harmon Wilson. Workbook for Use with Business-economic Problems. [Cincinnati : New York, etc.: South-western Publishing Co., 1936.
Lua MLA (8ú heag.)Shields, Harold Gustav, agus William Harmon Wilson. Workbook for Use with Business-economic Problems. South-western Publishing Co., 1936.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.