@book{220969,
	author = {ACHMAD, Hiskia and Ir.M.S.Tupamahu},
	title = {Struktur Atom, Struktur Molekul, dan Sistem Periodik },
	publisher = {Citra Aditya Bakti},
	year = {2001},
	address = {Bandung },
	edition = {2}
}