コーヒーとドーナツ
"it is very unfortunate that so many workers take only coffee and doughnuts for breakfast (if they take breakfast at all!) ..."
↑ Shelby County Historical Society (1992). Shelby County, Indiana History & Families. Shelby County, Indiana History & Families. Turner Publishing Company. p. 230. ISBN 978-1-56311-078-8. https://books.google.co.jp/books?id=Amu1n0c_5o8C&pg=PA230&redir_esc=y&hl=ja
↑ Palmatier, R.A. (2000). Food: A Dictionary of Literal and Nonliteral Terms. ABC-Clio ebook. Greenwood Press. p. 72. ISBN 978-0-313-31436-0. https://books.google.co.jp/books?id=OqIe3YFwsFkC&pg=PA72&redir_esc=y&hl=ja
↑ McMillan, Bo (2014年6月6日). “Disaster brewing for doughnuts—blame coffee prices”.