(1978). Facts in focus. Penguin.
Chicago Style (17th ed.) CitationFacts in Focus. Harmondsworth: Penguin, 1978.
MLA citiranjeFacts in Focus. Penguin, 1978.
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(1978). Facts in focus. Penguin.
Chicago Style (17th ed.) CitationFacts in Focus. Harmondsworth: Penguin, 1978.
MLA citiranjeFacts in Focus. Penguin, 1978.