牛田泰正 (Yasumasa Uchida) (Spring 2007). 観光地における飲食業 [The food and drink industry in sightseeing areas] (PDF) (in Japanese). p. 50. Archived from the original(PDF) on July 27, 2011. Retrieved December 11, 2010.
牛田泰正 (Yasumasa Uchida) (Spring 2007). 観光地における飲食業 [The food and drink industry in sightseeing areas] (PDF) (in Japanese). p. 50. Archived from the original(PDF) on July 27, 2011. Retrieved December 11, 2010.