Afiah, Devi Siti. “The Students’ Speaking Skill Analaysis on Local Wisdom- Based Topics (A Study at the First Year Grade of Mathematics Department of Unswagati)”. Academic Journal Perspective : Education, Language, and Literature, vol. 5, no. 2, Sept. 2017, pp. 143-9, doi:10.33603/perspective.v5i2.822.