THE RELATIONSHIP AMONG LEARNERS’ SELF-EFFICACY, THEIR ENGLISH PROFICIENCY AND THEIR CONTENT AREA SUBJECT ACHIEVEMENT. JBLS [Internet]. 2013 Jun. 4 [cited 2026 Jan. 23];5(1):25-34. Available from: https://ejournal.uinsatu.ac.id/index.php/ls/article/view/2036