https://www.slideshare.net/albertorocha11/summary-world-30
https://moodle.cqu.edu.au/pluginfile.php/585866/mod_label/intro/MGMT20144%20Reading%2010.2.pdf
http://ww.gnedenko-forum.org/Journal/2010/022010/RTA_2_2010-09.pdf
http://reports.weforum.org/global-risks-2017/
https://www.wesfarmers.com.au/docs/default-source/reports/2016-annual-report.pdf?sfvrsn=4
http://www.wesfarmers.com.au/docs/default-source/asx-announcements/2016-tax-contribution-report.pdf?sfvrsn=0