O'Neill, R. (1984). Kernel Three: Teacher's book. England: Longman.
शिकागो स्टाइल उद्धरणO'Neill, Robert. Kernel Three: Teacher's Book. England: Longman, 1984.
एमएलए उद्धरणO'Neill, Robert. Kernel Three: Teacher's Book. England: Longman, 1984.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.