Kaedah Aritmetik Mental  Secara Penulisan Dan Kira Cepat :Jilid 1 
H.Q Yap 
 - Johor  SKI Global Marketing  2004 
 - v,  ill.  25cm. 
<br/><br/><label>ISBN: </label>9834155301 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmetic--Study and teaching<br/>Mental arithmetic