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Hadi, Ayu Sofyana (2013) The Implementation of Cooperative Group Investigation (CGI) Method to Improve English Speaking Skill of the Second Year Students of MA Ma'arif 8 Ihyaul-Ulum Lamongan. Undergraduate (S1) thesis, STAIN Kediri.
Hadi, Ayu Sofyana (2013) The implementation of cooperative group investigation (CGI) method to improve English speaking skill of the second year students of MA Ma’arif 8 Ihyaul Ulum Lamongan. Undergraduate (S1) thesis, IAIN Kediri.