This is chapter 17 of the book Ethics in Psychotherapy and Counseling: A Practical Guide, 4th Edition by Kenneth S. Pope, Ph.D., ABPP & Melba J.T. Vasquez, Ph.D., ABPP, published by John Wiley.
Few responsibilities are so heavy and intimidating as responding to suicidal risk. The need for careful assessment is great. Suicide remains among the top dozen causes of death in the United States, as high as number two for some groups. Homicide rates seize popular attention, but far more people kill themselves than kill others. Authorities in the field are almost unanimous in their view that the reported figures vastly understate the actual incidence because of problems in reporting procedures.
The book chapter is here, published by Ken Pope on his site.