APA (7th ed.) Citation

Vellas, F., Wilde, S., Bécherel, L., & Aguas, P. (1995). An encyclopedia of international tourism. Serdi.

Chicago Style (17th ed.) Citation

Vellas, François, Simon Wilde, Lionel Bécherel, and Paulo Aguas. An Encyclopedia of International Tourism. Paris: Serdi, 1995.

MLA (8th ed.) Citation

Vellas, François, et al. An Encyclopedia of International Tourism. Serdi, 1995.