Against Naturalism, Cornell University Press. ISBN 0-8014-8763-3 William Lane Craig and J.P. Moreland, eds., 2000, Naturalism: A Critical Analysis, Routledge
former longtime Missouri senator, dead at 92 'Logan's Run' Co-Author George Clayton Johnson Dies at 86. [2015-12-28]. (原始内容存档于2015-12-26). Robert Spitzer
June 2006 [24 April 2018]. (原始内容存档于18 June 2006). Kalil, M. Best-selling author of book on serial killer kills himself. Las Vegas Review-Journal. 13 June