Nining Hajeniati & Andi Kaharuddin. (2022). Innovation of the problem based learning model with contextual teaching learning in mathematics learning in the Industrial Revolution 4.0 era: A comparative case studies. IIES Independent.

Nining Hajeniati and Andi Kaharuddin. Innovation of the Problem Based Learning Model with Contextual Teaching Learning in Mathematics Learning in the Industrial Revolution 4.0 Era: A Comparative Case Studies. IIES Independent, 2022.

Nining Hajeniati and Andi Kaharuddin. Innovation of the Problem Based Learning Model with Contextual Teaching Learning in Mathematics Learning in the Industrial Revolution 4.0 Era: A Comparative Case Studies. IIES Independent, 2022.