Hussey D.E. (1994). Corporate Planning Theory And Practice (2 th.). Pergamon Press Ltd.,Headington Hill Hall.
Lua i Stíl Chicago (17ú heag.)Hussey D.E. Corporate Planning Theory And Practice. 2 th. UK: Pergamon Press Ltd.,Headington Hill Hall, 1994.
Lua MLA (9ú heag.)Hussey D.E. Corporate Planning Theory And Practice. 2 th. Pergamon Press Ltd.,Headington Hill Hall, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.