http://repository.uhamka.ac.id/id/eprint/11991/
Peer Reviu_INCREASING MATHEMATICAL CRITICAL THINKING SKILLS USING ADVOCACY LEARNING WITH MATHEMATICAL PROBLEM SOLVING
Samsul Maarif, SMF
http://repository.uhamka.ac.id/id/eprint/11991/1/SINTA%202_Increasing%20Mathematical%20Critical%20Thinking%20Skill.pdf