एपीए उद्धरण

(2002). Longman language activator: Helps you write and speak natural English. London: Longman.

शिकागो स्टाइल उद्धरण

Longman Language Activator: Helps You Write and Speak Natural English. London: Longman, 2002.

एमएलए उद्धरण

Longman Language Activator: Helps You Write and Speak Natural English. London: Longman, 2002.