Parreņo, Elizabeth B. ; Jimenez, Ronel O., c2014. Basic Statistics : A Worktext / Parreņo, Elizabeth B. ; Jimenez, Ronel O. - 2nd. - Quezon City, Philippines : C & E Publishing Inc, c2014. - 272p. : ill. ; 8.5 inch. ISBN: 978-971-980-089-7