Harga purata Getah Mutu Malaysia mengikut gred terpilih,  2007-2011  [article] 
 Average prices of Standard Malaysia Rubber by selected grades,  2007-2011 

 - Putrajaya :  Jabatan Perangkaan Malaysia,  2009- 
<br/><br/> PTSL Dokumen (Page :100), (Call Number : MK10 JPER 4 B848 2011)