Gaya APA

Sara, M., Yee, L, M. (2011). Teaching Wihth Prosedural Variation : Matematics Teaching . Jakarta: International Journal for Mathematics Teaching and Learning.

Gaya MLA

Sara, Murray., Yee, Lai, Mun. "Teaching Wihth Prosedural Variation : Matematics Teaching". Jakarta: International Journal for Mathematics Teaching and Learning, 2011. Text.