Kiefer, Nicholas M. Economics and the Origin of the Restaurant(PDF). Cornell Hotel and Restaurant Administration Quarterly,. 2002-08: pp 5 – 7 [2020-10-24]. (原始内容(PDF)存档于2009-03-26). 引文格式1维护:冗余文本 (link) (pdf)
Kiefer, Nicholas M. Economics and the Origin of the Restaurant(PDF). Cornell Hotel and Restaurant Administration Quarterly,. 2002-08: pp 5 – 7 [2020-10-24]. (原始内容(PDF)存档于2009-03-26). 引文格式1维护:冗余文本 (link) (pdf)