@book{1397,
	author = {Ross, Sheldon M.},
	title = {Introductory stadistics /},
	publisher = {Elsevier,},
	year = {[2017].},
	address = {London, England :},
	edition = {Fourth edition.},
	note = {Includes index.},
	url = {https://itmsp.museknowledge.com/UOH?qurl=https://libros-uoh.uoh.cl/ebook/004325-Introductory-stadistics}
}