Cite web URL http://ummgc.org/about/history_html_5 Title University of Michigan Men's Glee Club || About | History_html_5 Publisher Ummgc.org URL access date 2011-12-28 ↑ http://www.dailymail.co.uk/news/article-3323166/Some-college-students-Yale-Brown-prefer-finger-snapping-applause.html ↑ Putnam, Margaret (1991-03-06). "Dancing sound effects Sumatrans perform with chest-slapping and finger-snapping". The Dallas Morning News.