Sidharta, Iwan. “Behavior Performance: A Validity of Performance Management Behavior Questionnaire (PBQ) Instrument”. Jurnal Computech & Bisnis (e-Journal), vol. 12, no. 2, Dec. 2018, pp. 171-8, http://jurnal.stmik-mi.ac.id/index.php/jcb/article/view/122.