Gaya APA

RAHMAWATI, N. (2017). Developing Problem-Based English Speaking Materials For Enhacing Grade X Students' Critical Thingking Skills . Yogyakarta: English Education Post Graduate School State University of Yogyakarta.

Gaya MLA

RAHMAWATI, Nur. "Developing Problem-Based English Speaking Materials For Enhacing Grade X Students' Critical Thingking Skills". Yogyakarta: English Education Post Graduate School State University of Yogyakarta, 2017. .