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"O-M." Fullformexpand.com, https://www.fullformexpand.com/o-m/442104. Accessed 18 Nov. 2025.
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"O-M." (n.d.). Fullformexpand.com. Retrieved November 18, 2025, from https://www.fullformexpand.com/o-m/442104.
O-M. (2025). Fullformexpand.com. Available at: https://www.fullformexpand.com/o-m/442104 (Accessed: 18 November 2025).