एपीए उद्धरण

Gallagher, N. (2007). Delta’s key to the next generation TOEFL® test (Disk 2 - Test 2): Six practice tests for the iBT. McHenry, IL: Delta Pub. Co.

शिकागो स्टाइल उद्धरण

Gallagher, Nancy. Delta’s Key to the Next Generation TOEFL® Test (Disk 2 - Test 2): Six Practice Tests for the IBT. McHenry, IL: Delta Pub. Co, 2007.

एमएलए उद्धरण

Gallagher, Nancy. Delta’s Key to the Next Generation TOEFL® Test (Disk 2 - Test 2): Six Practice Tests for the IBT. McHenry, IL: Delta Pub. Co, 2007.