^Morris 1997, p. 7. sfn error: no target: CITEREFMorris1997 (help)
^Kumar, Pankaja Pradeep (2005). "Effective Use of Gantt Chart for Managing Large Scale Projects". Cost Engineering. Morgantown, WV: American Association of Cost Engineers. 47 (7): 13–21. ISSN0274-9696. OCLC209778284.