Gaya APA

Lestari, F. (2013). Politeness Strategies Performed by Students of TBI Sixth Semester in Classroom Discussions . Tulungagung: STAIN Tulungagung.

Gaya MLA

Lestari, Findra. "Politeness Strategies Performed by Students of TBI Sixth Semester in Classroom Discussions". Tulungagung: STAIN Tulungagung, 2013. Skripsi.