Παραπομπή APA

Hall, M., & Harkonen, T. (2009). Lake tourism: An integrated approach to lacutrine tourism systems. CBS.

Παραπομπή Chicago Style

Hall, Michael, και Tuija Harkonen. Lake Tourism: An Integrated Approach to Lacutrine Tourism Systems. New Delhi: CBS, 2009.

Παραπομπή MLA

Hall, Michael, και Tuija Harkonen. Lake Tourism: An Integrated Approach to Lacutrine Tourism Systems. CBS, 2009.