APA (7th ed.) Citation

Σιγάλα, Μ., Christou, E., & Gretzel, U. (2012). Social media in travel, tourism and hospitality: Theory, practice and cases. Ashgate.

Chicago Style (17th ed.) Citation

Σιγάλα, Μαριάννα, Evaggelos Christou, and Ulrike Gretzel. Social Media in Travel, Tourism and Hospitality: Theory, Practice and Cases. England: Ashgate, 2012.

MLA (9th ed.) Citation

Σιγάλα, Μαριάννα, et al. Social Media in Travel, Tourism and Hospitality: Theory, Practice and Cases. Ashgate, 2012.