एपीए उद्धरण

Nguyễn Tường Châu. (2010). Practice tests for learners of business english: Pre-Intermediate. Hà Nội: Phương Đông.

शिकागो स्टाइल उद्धरण

Nguyễn Tường Châu. Practice Tests for Learners of Business English: Pre-Intermediate. Hà Nội: Phương Đông, 2010.

एमएलए उद्धरण

Nguyễn Tường Châu. Practice Tests for Learners of Business English: Pre-Intermediate. Hà Nội: Phương Đông, 2010.