@book{199212,
	author = {CAYNE, Bernad S. and Sabrony Rachmadie},
	title = {Ilmu Pengetahuan Populer Jilid 9 : Ilmu Pengetahuan Manusia - Teknologi},
	publisher = {Grolier International-Widyadara},
	year = {2005},
	address = {Jakarta}
}