एपीए उद्धरण

Spencer, D. H. . .. (1963). English for proficiency. Oxford University Press.

शिकागो स्टाइल उद्धरण

Spencer, D H. English for Proficiency. New Delhi: Oxford University Press, 1963.

एमएलए उद्धरण

Spencer, D H. English for Proficiency. Oxford University Press, 1963.