http://quantrung.com.vn/ http://ils.pup.edu.ph/cgi-bin/koha/opac-search.pl?q=Provider:John%20Wiley%20&%20Sons, http://www.wseas.us/e-library/conferences/2011/Iasi/AEBD/AEBD-04.pdf http://www.wseas.us/e-library/conferences/2011/Iasi/AEBD/AEBD-04.pdf https://www.amazon.com/Randall-S.-Schuler/e/B001H6PPYW/ref=dp_byline_cont_book_1 https://www.amazon.com/s/ref=dp_byline_sr_book_2?ie=UTF8&text=Susan+E.+Jackson&search-alias=books&field-author=Susan+E.+Jackson&sort=relevancerank trang bia chinh Trang phu bia NOI DUNG_23.11.2017 PHU LUC LUAN VAN_23.11.2017