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3. An international display of chiropractic WFC 9th Biennial Congress highlights past, present and future of the profession. Dynamic chiropractic—July 16, 2007, vol. 25, issue 15. http://www.dynamicchiropractic.com/pdf_out/DynamicChiropractic.com-An-International-Display-of-Chiropractic-1381619704.pdf.
4. WFC quarterly world report, June 30, 2013. https://www.wfc.org/website/images/wfc/qwr/QWR201306_finalamended_July7.pdf.