HEGAR, K. (1985). Study Guide For Business Kathryn Hegar. Hougton Mifflin.
Lua i Stíl Chicago (17ú heag.)HEGAR, Kathryn. Study Guide For Business Kathryn Hegar. Hougton Mifflin, 1985.
Lua MLA (8ú heag.)HEGAR, Kathryn. Study Guide For Business Kathryn Hegar. Hougton Mifflin, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.