Ramadhan, Tri, 		Pravitasari, Norma, AND 		Syuhardi, Yossi.
" Perancangan aplikasi reserved messenger office berbasis java netbeans pada PT Geotechcnical Systemindo" <em>Journal of Information System, Applied, Management, Accounting and Research</em> [Online], Volume 5 Number 4 (4 November 2021)