APA-viite

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

Chicago-tyylinen lähdeviittaus

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

MLA-viite

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