A Faraway Ancient Country. Lulu. Consultado el 27 de marzo de 2010. «Forty-eight witnesses would later come forward to substantiate this case and the unbelievable incidents that occurred.»
Evil: Satan, Sin, and Psychology. Paulist Press. Consultado el 3 de abril de 2010. «Yet the problem is that Robbie's eyewitnesses were spread out. they came from entirely different settings and reported the same things. For instance, the shaking bed was reported by numerous people both in the Washington D.C. area and in St. Louis. Is it really possible that forty-eight eyewitnesses in different areas and at different times were all hysterical?»
