Gaya APA

Ruhmana, U, W. (2015). Comparative study of politeness strategies used by an American and British Radio interviewers . Kediri: STAIN KEDIRI.

Gaya MLA

Ruhmana, Uma, Wahdiyanti. "Comparative study of politeness strategies used by an American and British Radio interviewers". Kediri: STAIN KEDIRI, 2015. Text.