WELLS, W. (1985). Study Guide Communications In Business Walter Wells. Kenth Publising.
Lua i Stíl Chicago (17ú heag.)WELLS, Walter. Study Guide Communications In Business Walter Wells. Kenth Publising, 1985.
Lua MLA (8ú heag.)WELLS, Walter. Study Guide Communications In Business Walter Wells. Kenth Publising, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.