Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Cahn, Dudley D., Jr.",Letting go : a practical theory of relationship disengagement and reengagement,,State University of New York Press,1987,SUNY series in human communication processes,,"0887064523,088706454X",,https://cir.nii.ac.jp/crid/1130000794587959936