What does PTR stand for?

MLA style: "PTR." Acronym Finder . 2012. AcronymFinder.com 3 Jun. 2012 http://www.acronymfinder.com/Philippine-Tax-Registration-(PTR).html
Chicago style: Acronym Finder . S.v. "PTR." Retrieved June 3 2012 from http://www.acronymfinder.com/Philippine-Tax-Registration-(PTR).html
APA style: PTR. (n.d.) Acronym Finder. (2012). Retrieved June 3 2012 from http://www.acronymfinder.com/Philippine-Tax-Registration-(PTR).html

Philippine Tax Registration

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