ANG, S. H. (2014). Research design for business & management. Sage Publications.
Lua i Stíl Chicago (17ú heag.)ANG, Siah Hwee. Research Design for Business & Management. Sage Publications, 2014.
Lua MLA (9ú heag.)ANG, Siah Hwee. Research Design for Business & Management. Sage Publications, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.