APA   Click to copy
Stergiou, D., & Airey, D. (2018). Understandings of Tourism Theory. Tourism Review, 73(2), 156–168. https://doi.org/10.1108/TR-07-2017-0120

Chicago/Turabian   Click to copy
Stergiou, D., and D Airey. “Understandings of Tourism Theory.” Tourism Review 73, no. 2 (2018): 156–168.

MLA   Click to copy
Stergiou, D., and D. Airey. “Understandings of Tourism Theory.” Tourism Review, vol. 73, no. 2, 2018, pp. 156–68, doi:10.1108/TR-07-2017-0120.

@article{stergiou2018a,
  title = {Understandings of Tourism Theory},
  year = {2018},
  issue = {2},
  journal = {Tourism Review},
  pages = {156-168},
  volume = {73},
  doi = {10.1108/TR-07-2017-0120},
  author = {Stergiou, D. and Airey, D}
}