Ulfi, Mohammad Syaifudin and Holisin, Iis and Suprapti, Endang (2019) MENINGKATKAN HASIL BELAJAR MATEMATIKA MELALUI MODEL PEMBELAJARAN BLENDED LEARNING BERBASIS SCHOOLOGY DI SMA MUHAMMADIYAH 2. Universitas Muhammadiyah Surabaya, pp. 123-130. ISBN 9786237259121
Ulfi, Mohammad Syaifudin (2019) Meningkatkan Hasil Belajar Matematika Melalui Model Pembelajaran Blended Learning Berbasis Schoology Di SMA Muhammadiyah 2 Surabaya. Undergraduate Thesis thesis, Universitas Muhammadiyah Surabaya.