Sigala, M., Christou, E., & Gretzel, U. (2015). Social media in travel, tourism and hospitality: Theory, practice and cases. Ashgate Pub.
Παραπομπή Chicago StyleSigala, Marianna, Evangelos Christou, και Ulrike Gretzel. Social Media in Travel, Tourism and Hospitality: Theory, Practice and Cases. Ashgate Pub, 2015.
Παραπομπή MLASigala, Marianna, Evangelos Christou, και Ulrike Gretzel. Social Media in Travel, Tourism and Hospitality: Theory, Practice and Cases. Ashgate Pub, 2015.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.