Juneaux. (2015). Toggle buttons Part II. Renaissance Magazine, 20(6), 48+. Retrieved from http://link.galegroup.com/apps/doc/A439634076/GPS?u=avlr&sid=GPS&xid=e2020c95 (1)
Britannica, T. E. (2011, November 02). Button. Retrieved from https://www.britannica.com/topic/button-clothing-accessory (2)
BETTONI, B. (2014). Fashion, Tradition, and Innovation in Button Manufacturing in Early Modern Italy. Technology & Culture, 55(3), 675-710. (3)
Antique and Vintage Military Buttons. (n.d.). Retrieved from https://www.collectorsweekly.com/military-and-wartime/buttons (4)
About Ira Green. (n.d.). Retrieved from https://www.iragreen.com/about-us (5)
1775 – 1783 The AmericanContinental Army. (2018, February 11). Retrieved from http://www.georgewashingtoninauguralbuttons.com/1775-1783-the-americancontinental-army/ (6)
C. (2016, July 15). All About Collecting, Storing, and Cleaning Buttons. Retrieved from https://hobbylark.com/collecting/Buttons-and-their-values (7)
Buttons. (2015, October 19). Retrieved from http://americanhistory.si.edu/object-project/ready-wear/buttons (8)
顾. (n.d.). Cute as a button. Retrieved from http://usa.chinadaily.com.cn/a/201803/14/WS5aa87c6da3106e7dcc14182a.html (9)
Button Making Process. (n.d.). Retrieved from http://www.teonline.com/knowledge-centre/button-making-process.html (10)
Buttons Wholesale, Cheap Buttons Supplies. (n.d.). Retrieved from https://www.nbeads.com/a-218-buttons.html?gclid=Cj0KCQjwre_XBRDVARIsAPf7zZjKLwL70P0NCTodCiFCNy1RotFPVLRTzf1AP_9uzNhrziOY5LTVmpEaArXhEALw_wcB (11)
(n.d.). Retrieved from http://www.workroombuttons.com/ (12)
Carlson, N. (2012, April 24). Pinterest CEO: Here's How We Became The Web's Next Big Thing [DECK]. Retrieved from http://www.businessinsider.com/pinterest-founding-story-2012-4 (13)
J. (1970, January 01). Jillions of Buttons. Retrieved from http://jillionsofbuttons.blogspot.com/2012/09/army-locket-button.html (14)
Rice, P. D. (n.d.). Retrieved from http://www.buttoncountry.com/Workshop1.html (15)