(1971). Industrial Organization And Management Lawrence L. Bethel Et.al. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Industrial Organization And Management Lawrence L. Bethel Et.al. McGraw-Hill, 1971.
Lua MLA (8ú heag.)Industrial Organization And Management Lawrence L. Bethel Et.al. McGraw-Hill, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.