Backer, E., & King, B. (2015). VFR travel research: International perspectives. Channel View Publications.
Citazione stile Chigago Style (17a edizione)Backer, Elisa, e Brian King. VFR Travel Research: International Perspectives. Bristol: Channel View Publications, 2015.
Citatione MLA (9a ed.)Backer, Elisa, e Brian King. VFR Travel Research: International Perspectives. Channel View Publications, 2015.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.