Marriott corporation

https://www.marriottvacationsworldwide.com/downloads/presskits/Company-Facts.pdf

http://www.marriott.com/culture-and-values/marriott-family-history.mi

http://www.marriott.com/about/culture-and-values/history.mi

http://www.referenceforbusiness.com/history2/12/Marriott-International-Inc.html

https://www.library.hbs.edu/hc/lehman/company.html?company=marriott_corporation

http://traveltips.usatoday.com/history-marriott-hotel-21444.html

https://www.forbes.com/sites/danschawbel/2013/02/04/j-w-marriott-jr-from-root-beer-stand-to-global-hotel-company/#329e6ca85e1f