Ramadhan, T., 		Pravitasari, N., & 		Syuhardi, Y.
(2021).
 Perancangan aplikasi reserved messenger office berbasis java netbeans pada PT Geotechcnical Systemindo.
<em>Journal Of Information System, Applied, Management, Accounting And Research, 5</em>(4), 885-889.
doi:10.52362/jisamar.v5i4.548