एपीए उद्धरण

Gallagher, N. (2005). Delta’s key to the next generation TOEFL® test advanced skill practice: Listening. McHenry, IL: Delta Pub. Co.

शिकागो स्टाइल उद्धरण

Gallagher, Nancy. Delta’s Key to the Next Generation TOEFL® Test Advanced Skill Practice: Listening. McHenry, IL: Delta Pub. Co, 2005.

एमएलए उद्धरण

Gallagher, Nancy. Delta’s Key to the Next Generation TOEFL® Test Advanced Skill Practice: Listening. McHenry, IL: Delta Pub. Co, 2005.