एपीए उद्धरण

John R Walker. (2011). Tourism: Concepts and practices. Pearson.

शिकागो स्टाइल उद्धरण

John R Walker. Tourism: Concepts and Practices. New Delhi: Pearson, 2011.

एमएलए उद्धरण

John R Walker. Tourism: Concepts and Practices. Pearson, 2011.