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"GBKU." Fullformexpand.com, https://www.fullformexpand.com/gbku/381409. Accessed 17 Feb. 2026.
Fullformexpand.com, 2026. "GBKU." Accessed February 17, 2026. https://www.fullformexpand.com/gbku/381409.
"GBKU." (n.d.). Fullformexpand.com. Retrieved February 17, 2026, from https://www.fullformexpand.com/gbku/381409.
GBKU. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/gbku/381409 (Accessed: 17 February 2026).