Zakrimal, Zakrimal. “Pamor Blackberry Messenger Terhadap Efektivitas Komunikasi Staff Notaris Dan PPAT”. Computer Based Information System Journal 2, no. 2 (March 6, 2014). Accessed December 4, 2024. https://ejournal.upbatam.ac.id/index.php/cbis/article/view/382.