Gaya APA

Ludwig, G. (2012). The development of mathematics teaching and learning 'models': experience of seameo qitep in mathematic (Vol. 04, No. 01, Tahun). : PASPI.

Gaya MLA

Ludwig, Gerd. "The development of mathematics teaching and learning 'models': experience of seameo qitep in mathematic". Vol. 04, No. 01, Tahun : PASPI, 2012. Text.