@book{177792,
	author = {Triola, Mario F. and  Pineda Ayala, Leticia Esther},
	title = {Estadística  /},
	publisher = { Pearson Educación,},
	year = {2004},
	address = {México  :},
	edition = {9a ed.},
	note = {Título original: Elementary statistics}
}