Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Christou, Evangelos, Ulrike Gretzel, y Marianna Sigala. Social Media in Travel, Tourism and Hospitality: Theory, Practice and Cases. Farnham [etc.]: Ashgate, 2012.

Cita MLA (9a ed.)

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