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Fullformexpand.com, 2026. "DUO." Accessed January 18, 2026. https://www.fullformexpand.com/duo/568650.
"DUO." (n.d.). Fullformexpand.com. Retrieved January 18, 2026, from https://www.fullformexpand.com/duo/568650.
DUO. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/duo/568650 (Accessed: 18 January 2026).