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.
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