@book{168981,
	author = {Seo, Chan Suk, and Kim, Hong Sung,},
	title = {Why? MATEMATIK.},
	publisher = {Orbit Buku Sdn. Bhd.,},
	year = {[2017?]},
	address = {Petaling Jaya, Selangor :},
	note = {Includes questions and answers}
}