एपीए उद्धरण

Williams, G. R. (1972). The hidden world of Scotland Yard. Hutchinson & Co.

शिकागो स्टाइल उद्धरण

Williams, Guy R. The Hidden World of Scotland Yard. London: Hutchinson & Co, 1972.

एमएलए उद्धरण

Williams, Guy R. The Hidden World of Scotland Yard. Hutchinson & Co, 1972.