Perangkaan utama perkhidmatan pakar runding pengurusan dan penyelidikan pasaran, 2002 - 2010 
 Principal statistics of management consultancy and market research services, 2002 - 2010  [article] 

 - Putrajaya :  Jabatan Perangkaan Malaysia,  2011 
<br/><br/> PTSL Dokumen (Page : 171), (Call Number : MK10 JPER 4 H378 2011)