70 tips mencapai kebahagiaan / 
penyusun : H.M. Yusuf Sinaga 
 - Johor :  Perniagaan Jahabersa,  2006 
 - 195 p. ;  22 cm. 
<br/><br/><label>ISBN: </label>9831709446 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Happiness--Religious aspects--Islam<br/>Religious life--Islam<br/>Islam--Customs and practices