http://repository.uhamka.ac.id/id/eprint/12695/
Differences between quadratic equations and functions: Indonesian pre-service secondary mathematics teachers’ views
Aziz, Tian Abdul
http://repository.uhamka.ac.id/id/eprint/12695/1/02_P_2018_Prosiding_IOP_Differences%20Quadratic_Puri%20dkk.pdf