एपीए उद्धरण

Vijayakumar, B., & Sam , N. (2009). Sustainable development of tourismm in Kerala. International centre for Kerala Studies,University of Kerala.

शिकागो स्टाइल उद्धरण

Vijayakumar, B., और N. Sam. Sustainable Development of Tourismm in Kerala. Thiruvananthapuram: International centre for Kerala Studies,University of Kerala, 2009.

एमएलए उद्धरण

Vijayakumar, B., और N. Sam. Sustainable Development of Tourismm in Kerala. International centre for Kerala Studies,University of Kerala, 2009.