APA (7th ed.) Citation

Luz, N., Anacleto, R., & Almeida, A. (2013). Tourism mobile and recommendation systems - a state of the art.

Chicago Style (17th ed.) Citation

Luz, Nuno, Ricardo Anacleto, and Ana Almeida. Tourism Mobile and Recommendation Systems - a State of the Art. 2013.

MLA (8th ed.) Citation

Luz, Nuno, et al. Tourism Mobile and Recommendation Systems - a State of the Art. 2013.