M Sudirman
Mathematics departement of Postgraduate Program Indonesia University of Education,
Jl. setiabudi no.229 Bandung Jawa Barat 40154, INDONESIA Indonesia
S Fatimah
Mathematics departement of Postgraduate Program Indonesia University of Education,
Jl. setiabudi no.229 Bandung Jawa Barat 40154, INDONESIA Indonesia
A Jupri
Mathematics departement of Postgraduate Program Indonesia University of Education,
Jl. setiabudi no.229 Bandung Jawa Barat 40154, INDONESIA Indonesia