http://repository.uhamka.ac.id/id/eprint/11990/
Peer Reviu_Development of Mathematical Problem Solving Tests on Geometry for
Junior High School Students
Samsul Maarif, SMF
http://repository.uhamka.ac.id/id/eprint/11990/1/SINTA%202_Development%20of%20Mathematiscs%20Problem%20Solving.pdf