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"ERTK." Fullformexpand.com, https://www.fullformexpand.com/ertk/369487. Accessed 20 Nov. 2025.
Fullformexpand.com, 2025. "ERTK." Accessed November 20, 2025. https://www.fullformexpand.com/ertk/369487.
"ERTK." (n.d.). Fullformexpand.com. Retrieved November 20, 2025, from https://www.fullformexpand.com/ertk/369487.
ERTK. (2025). Fullformexpand.com. Available at: https://www.fullformexpand.com/ertk/369487 (Accessed: 20 November 2025).