एपीए उद्धरण

Nguyễn,Thị Thảo. (2016). A study of language expressions used as politeness strategies in english refusal business letters. ĐHNN.

शिकागो स्टाइल उद्धरण

Nguyễn,Thị Thảo. A Study of Language Expressions Used As Politeness Strategies in English Refusal Business Letters. ĐHNN, 2016.

एमएलए उद्धरण

Nguyễn,Thị Thảo. A Study of Language Expressions Used As Politeness Strategies in English Refusal Business Letters. ĐHNN, 2016.