APA:Chan Li Ying, Sharifah Osman, Dian Kurniati, Edi Sunjayanto Masykuri, Jeya Amantha Kumar, Chuzairy Hanri. (Volume-8, Issue-11 -(Year-2020)). Difficulties that students face when learning algebraic problem-solving. Retrieved from http://www.hrpub.org/download/20201030/UJER43-19517427.pdf
Chicago:Chan Li Ying, Sharifah Osman, Dian Kurniati, Edi Sunjayanto Masykuri, Jeya Amantha Kumar, Chuzairy Hanri. "Difficulties that students face when learning algebraic problem-solving" Example, Volume-8-issue-11-Year-2020-5405-5413. http://www.hrpub.org/download/20201030/UJER43-19517427.pdf.
