@book{184488,
	author = {Ammar Khalis,},
	title = {Pulih dan Pelihara Bunyi /},
	publisher = {E 1 PUBLICATION SDN. BHD.,},
	year = {[2021?]},
	series = {SIRI SAINS ALAM SEKITAR},
	address = {Kuala Lumpur :}
}