एपीए उद्धरण

(2008). Grammar Sense 4: Advanced grammar and writing (Kèm theo CD/ 854-56).

शिकागो स्टाइल उद्धरण

Grammar Sense 4: Advanced Grammar and Writing (Kèm Theo CD/ 854-56). 2008.

एमएलए उद्धरण

Grammar Sense 4: Advanced Grammar and Writing (Kèm Theo CD/ 854-56). 2008.