Salem, M. O., T. L. DeCicco, M. A. Ragab, S. Yousif, A. L. Murkar, and M. Vaswani. “Spiritual and Religious Imagery in Dreams: A Cross Cultural Analysis”. International Journal of Dream Research, vol. 6, no. 2, Oct. 2013, pp. 94-97, doi:10.11588/ijodr.2013.2.10333.