Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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