Sing, C. K. (2004). Electronic commerce and supply chain management. Thomson.
Lua i Stíl Chicago (17ú heag.)Sing, Chan Kah. Electronic Commerce and Supply Chain Management. Thomson, 2004.
Lua MLA (8ú heag.)Sing, Chan Kah. Electronic Commerce and Supply Chain Management. Thomson, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.