N. Salimatul Ummah, M. Muarifin, and A. Pitoyo, “The Effect Of The Jigsaw Type Cooperative Learning Model On The Writing Skills Of Grade X Students at SMA Negeri 4 Kediri In Negotiation Text Material For The 2024/2025 Academic Year”, BIP, vol. 7, no. 2, pp. 134–146, Sep. 2025.