Duhme, L. (2012). Cultural tourism: Case study Portugal. Diplomica Verlag.
芝加哥风格引文Duhme, Laura. Cultural Tourism: Case Study Portugal. Hamburg: Diplomica Verlag, 2012.
MLA引文Duhme, Laura. Cultural Tourism: Case Study Portugal. Diplomica Verlag, 2012.
警告：这些引文格式不一定是100％准确.