एपीए उद्धरण

Douglas, H. (1967). Hotel-keeping and catering. Robert Hale.

शिकागो स्टाइल उद्धरण

Douglas, Hugh. Hotel-keeping and Catering. London: Robert Hale, 1967.

एमएलए उद्धरण

Douglas, Hugh. Hotel-keeping and Catering. Robert Hale, 1967.