Ong, Henry Know your customer: assess your customer before letting them buy on credit/ Henry Ong. - Philippines: Summit Media, Apr-Jul 2015. - v15 n160, page 30: illustrations, 28 cm. Entrepreneur. ISSN: 01153544 Subjects--Topical Terms: Customer services Dewey Class. No.: DPer 338.05 En86 Apr-Jul 2015 v. 15, n. 158-161