APA Style

Si, Y, A, A, S. (2012). Workbook Mathematic Grade 1 Semester 1 . Malang: Teaching Traning and Education Development Institute (T2EDI).

MLA Style

Si, Yufita, Aris, Andriani,, S.. "Workbook Mathematic Grade 1 Semester 1". Malang: Teaching Traning and Education Development Institute (T2EDI), 2012. Text.