एपीए उद्धरण

David A Hough. (1993). Telephone skills: Essential telephone English. Oxford: Heinemann.

शिकागो स्टाइल उद्धरण

David A Hough. Telephone Skills: Essential Telephone English. Oxford: Heinemann, 1993.

एमएलए उद्धरण

David A Hough. Telephone Skills: Essential Telephone English. Oxford: Heinemann, 1993.