Cita APA (7th ed.)
Hpken, W., Gretzel, U., & Law, R. (2009). Information and Communication Technologies in Tourism 2009: Proceedings of the International Conference in Amsterdam, The Netherlands, 2009. Springer Vienna. https://doi.org/10.1007/978-3-211-93971-0
Cita Chicago (17th ed.)
Hpken, Wolfram, Ulrike Gretzel, i Rob Law. Information and Communication Technologies in Tourism 2009: Proceedings of the International Conference in Amsterdam, The Netherlands, 2009. Vienna: Springer Vienna, 2009. https://doi.org/10.1007/978-3-211-93971-0.
Cita MLA (9th ed.)
Hpken, Wolfram, et al. Information and Communication Technologies in Tourism 2009: Proceedings of the International Conference in Amsterdam, The Netherlands, 2009. Springer Vienna, 2009. https://doi.org/10.1007/978-3-211-93971-0.
Atenció: Aquestes cites poden no estar 100% correctes.