@book{78647,
	author = {Mohd Nain Hj. Awang and Umar Baba},
	title = {Number system and functions /},
	publisher = {Utusan Publications & Distributors,},
	year = {[2000]},
	series = {Siri pendidikan jarak jauh},
	address = {uala Lumpur :}
}