Apa & mengapa? / 
Hasan Hamzah ... [et al.] 
 - Shah Alam :  Ebiza Sdn. Bhd,  1997 
 - v. : ill. ;  27 cm. 
 - Siri ensiklopedia remaja .
<br/><br/><label>ISBN: </label>9839372009  RM379.96 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encyclopedias and dictionaries, Malay--Pictorial works<br/>Encyclopedias and dictionaries, Malay--Juvenile literature