Cita APA

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

Chicago Edition Citation

Sigala, Marianna, Evangelos Christou, i Ulrike Gretzel. Social Media in Travel, Tourism and Hospitality: Theory, Practice and Cases. Farnham, Surrey, Burlington, VT: Ashgate Pub., 2012.

Cita MLA

Sigala, Marianna, et al. Social Media in Travel, Tourism and Hospitality: Theory, Practice and Cases. Ashgate Pub., 2012.