एपीए उद्धरण

Kirby,Stephen, & Key, P. (1985). Penguin listening skills: Student's book. New York: Penguin books.

शिकागो स्टाइल उद्धरण

Kirby,Stephen, और Patty Key. Penguin Listening Skills: Student's Book. New York: Penguin books, 1985.

एमएलए उद्धरण

Kirby,Stephen, और Patty Key. Penguin Listening Skills: Student's Book. New York: Penguin books, 1985.