Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL "Friedman, Frank L. and Koffman, Elliot B.",Problem solving and structured programming in WATFIV,,Addison-Wesley Pub. Co.,1982,Addison-Wesley series in computer science and information processing,,0201104822,,https://cir.nii.ac.jp/crid/1130282271993976192