You can use the appropriate citation option from below to add a reference to this page.
"IT-21." Fullformexpand.com, https://www.fullformexpand.com/it-21/631618. Accessed 9 Jan. 2026.
Fullformexpand.com, 2026. "IT-21." Accessed January 9, 2026. https://www.fullformexpand.com/it-21/631618.
"IT-21." (n.d.). Fullformexpand.com. Retrieved January 9, 2026, from https://www.fullformexpand.com/it-21/631618.
IT-21. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/it-21/631618 (Accessed: 9 January 2026).