Cita APA (7a ed.)

UMAR, A. S. (2010). HOTSPOT BILLING SYSTEM.

Cita Chicago Style (17a ed.)

UMAR, AHMAD SYAIFUL. HOTSPOT BILLING SYSTEM. 2010.

Cita MLA (9a ed.)

UMAR, AHMAD SYAIFUL. HOTSPOT BILLING SYSTEM. 2010.