- Alexa (2017). Soles4Souls.org Traffic Statistics. Retrieved May 9, 2017 from http://www.alexa.com/siteinfo/soles4souls.org
- Birkenstock. (2017). History & Heritage. Retrieved May 7 , 2017 from http://www.birkenstock.com/us/us-about-history.html
- Birkenstock. (2017). Premium Materials. Retrieved May 7, 2017 from http://www.birkenstock.com/us/us-about-materials.html
- Carr, C. (March 12, 2006). Thank You for Insulting Our Shoes. The New York Times. Retrieved May 7, 2017 from http://www.nytimes.com/2006/03/12/fashion/sundaystyles/thank-you-for-insulting-our-sandals.html
- Hoovers( 2017). Birkenstock USA, Lp. Retrieved may 7, 2017 from http://www.hoovers.com/company-information/cs/competition.birkenstock_usa_lp.5017f1d7454d1b90.html
- Levy, A. (July 20, 2016). Birkenstock quits Amazon in US after counterfeit surge. CNBC. Retrieved May 7, 2017 from http://www.cnbc.com/2016/07/20/birkenstock-quits-amazon-in-us-after-counterfeit-surge.html
- Mead, R. (March 23, 2015). Sole Cycle. The homely Birkenstock gets a fashion makeover. The New Yorker. Retrieved May 7, 2017 from http://www.newyorker.com/magazine/2015/03/23/sole-cycle-rebecca-mead
- Nnadi, C. (July 29, 2013). Pretty Ugly: Why Vogue Girls Have Fallen for the Birkenstock. Vogue. Retrieved May7, 2017 from http://www.vogue.com/article/pretty-ugly-why-vogue-girls-have-fallen-for-the-birkenstock
- Pinknic (2017). Buy Tickets. Retrieved May 7, 2017 from http://www.pinknic.com/pinknic-2017/
- Remy, A. (November 9, 2013). Brand Equity. Retrieved May 8, 2017 from https://avaremy.wordpress.com/2013/11/09/brand-equity/
- Socialbakers(2016-2017). Birkenstock Facebook statistics. Retrieved May 9, 2017 from https://www.socialbakers.com/statistics/facebook/pages/detail/39835376573-birkenstock-usa
- Soles4Souls (2017). Talking points. Retrieved May 8, 2017 from https://3fh34p1ja5i545vd9y3yfd3n-wpengine.netdna-ssl.com/wp-content/uploads/2015/04/Soles4Souls-Talking-Points-2.pdf
- Soles4Souls (2017). Press one sheet. Retrieved from https://3fh34p1ja5i545vd9y3yfd3n-wpengine.netdna-ssl.com/wp-content/uploads/2015/04/Press-One-Sheet_3-17.pdf
- Soles4Souls (2017). Cause Marketing. Retrieved May 9, 2017 from https://soles4souls.org/get-involved/give-shoes/business/cause-marketing/
- Soles4Souls (2017). Give Shoes. Give Love. Retrieved May 9, 2017 from https://soles4souls.org/get-involved/give-shoes/
- YouTube (2017). Pinknic 2017 Trailer. Retrieved May 7, 2017 from https://www.youtube.com/watch?v=fIdaB2HFggg