Tài liệu tham khảo

WikiPedia: Han_T._Dinh http://www.biodieselmagazine.com/articles/290/beyo... http://fleetowner.com/news/usps_hybrid_electric_di... http://www.prnewswire.com/news-releases/postal-ser... http://www.pwmag.com/-call-centers/2006-trendsette... http://www.gbv.de/dms/tib-ub-hannover/192877178.pd... http://www.afdc.energy.gov/pdfs/usps_cs.pdf http://www.ofee.gov/ctc/2006CTCfinalpr.pdf http://www.asianamerican.net/bios/Dinh-Han.html http://www.sae.org/search/?authors=(%22Han%20Dinh%... https://web.archive.org/web/20060930004048/http://...