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"USKN." Fullformexpand.com, https://www.fullformexpand.com/uskn/uluslararasi-standart-kitap-numarasi. Accessed 16 Apr. 2026.
Fullformexpand.com, 2026. "USKN." Accessed April 16, 2026. https://www.fullformexpand.com/uskn/uluslararasi-standart-kitap-numarasi.
"USKN." (n.d.). Fullformexpand.com. Retrieved April 16, 2026, from https://www.fullformexpand.com/uskn/uluslararasi-standart-kitap-numarasi.
USKN. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/uskn/uluslararasi-standart-kitap-numarasi (Accessed: 16 April 2026).