एपीए उद्धरण

Green, D., & Diana Green; Sandra Allen; Nguyễn Quốc Hùng. (1999). English in focus level C: Workbook. Tp. Hồ Chí Minh: Nxb. Tp. Hồ Chí Minh.

शिकागो स्टाइल उद्धरण

Green, Diana, और Diana Green; Sandra Allen; Nguyễn Quốc Hùng. English in Focus Level C: Workbook. Tp. Hồ Chí Minh: Nxb. Tp. Hồ Chí Minh, 1999.

एमएलए उद्धरण

Green, Diana, और Diana Green; Sandra Allen; Nguyễn Quốc Hùng. English in Focus Level C: Workbook. Tp. Hồ Chí Minh: Nxb. Tp. Hồ Chí Minh, 1999.