एपीए उद्धरण

Thân Trọng Hoài Trang, & Nguyễn Văn Long, P. (2013). Politeness strategies manifested in refusal in English and Vietnamese. Da Nang: University of Danang.

शिकागो स्टाइल उद्धरण

Thân Trọng Hoài Trang, और Ph.D. Nguyễn Văn Long. Politeness Strategies Manifested in Refusal in English and Vietnamese. Da Nang: University of Danang, 2013.

एमएलए उद्धरण

Thân Trọng Hoài Trang, और Ph.D. Nguyễn Văn Long. Politeness Strategies Manifested in Refusal in English and Vietnamese. Da Nang: University of Danang, 2013.