@book{12389,
	author = {Vallejo Ayala, Patricio and Zambrano Orejuela, Jorge, autor.},
	title = {Física vectorial 1. /},
	publisher = {Rodin, },
	year = {2005},
	address = {Quito, Ecuador :},
	edition = {Sexta edición},
	note = {Incluye índice.}
}