@book{16351,
	author = {Hora, Nelda A. and Bagallon, Ligaya C.},
	title = {Heograpiya, Kasaysayan, at Sibika at Kultura ng Bansang Pilipinas 4},
	publisher = {St. Augustine Publications, Inc.,},
	year = {2000.},
	address = {Sampaloc, Manila:}
}