Wallace H. Campbell. Earth Magnetism: A Guided Tour Through Magnetic Fields. Academic Press, 2001. p. 2 "Written records show that a Chinese compass, Si Nan, had already been fabricated between 300 and 200 BE and used for the alignment of constructions to be magically harmonious with the natural Earth forces.
instituteoffengshui.com
«Feng Shui». Institute of Feng Shui. Consultado em 15 de maio de 2011. Arquivado do original em 13 de julho de 2011
skepdic.com
Carroll, Robert T. «feng shui». The Skeptic's Dictionary. Consultado em 14 de maio de 2012
