Putro, Utomo Sarjono, Kuntoro Mangkusubroto, and Khrisna Ariyanto. 2002. “Roles of Emotion in Negotiation Process: An Application of Drama Theory in Citarum Riverbasin Problem”. Jurnal Manajemen Teknologi 7 (1). https://journal.sbm.itb.ac.id/index.php/mantek/article/view/72.