Leigh, A. (1999). The ultimate business presentation book. Random House.
Lua i Stíl Chicago (17ú heag.)Leigh, Andrew. The Ultimate Business Presentation Book. London: Random House, 1999.
Lua MLA (9ú heag.)Leigh, Andrew. The Ultimate Business Presentation Book. Random House, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.