Khoo, A. (2011). Secrets of building multi-million dollar businesses. Elex Media Komputindo.
Lua i Stíl Chicago (17ú heag.)Khoo, Adam. Secrets of Building Multi-million Dollar Businesses. Elex Media Komputindo, 2011.
Lua MLA (8ú heag.)Khoo, Adam. Secrets of Building Multi-million Dollar Businesses. Elex Media Komputindo, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.