スノーホワイトデザイン言語
↑ Esslinger, Hartmut (2013年9月10日). “Keep It Simple”. designmind.frogdesign.com/. 2014年1月21日閲覧。
↑ Bidgoli, Hossein (2010). The Handbook of Technology Management: Supply Chain Management, Marketing and Advertising, and Global Management. Hoboken, New Jersey: John Wiley & Sons. p. 314. ISBN 978-0470249482. https://books.google.com/books?id=EKNoKQ1L4CoC&q=the+handbook+of+technology+management
↑ “An exclusive interview with Daniel Kottke”. India Today. (September 13, 2011). オリジナルのMay 18, 2012時点におけるアーカイブ。. https://webcitation.org/67kIGLdKd?url=http://indiatoday.intoday.in/story/india-visit-gave-a-vision-to-steve-jobs/1/154785.