BLACK K., . (2018). APPLIED BUSINESS STATSTICS. NEW DELHI: WILEY INDIA PVT LTD.
BLACK KEN, . 2018. APPLIED BUSINESS STATSTICS. NEW DELHI: WILEY INDIA PVT LTD.
BLACK KEN, . APPLIED BUSINESS STATSTICS. NEW DELHI: WILEY INDIA PVT LTD. 2018.