APA   Click to copy
Liu, T., & Gietel-Basten, S. (2019). The demography of drug abuse in Hong Kong. China Journal of Social Work, 12, 254–272.

Chicago/Turabian   Click to copy
Liu, Tong, and Stuart Gietel-Basten. “The Demography of Drug Abuse in Hong Kong.” China Journal of Social Work 12 (2019): 254–272.

MLA   Click to copy
Liu, Tong, and Stuart Gietel-Basten. “The Demography of Drug Abuse in Hong Kong.” China Journal of Social Work, vol. 12, Routledge, 2019, pp. 254–72.

@article{liu2019a,
  title = {The demography of drug abuse in Hong Kong},
  year = {2019},
  journal = {China Journal of Social Work},
  pages = {254--272},
  publisher = {Routledge},
  volume = {12},
  author = {Liu, Tong and Gietel-Basten, Stuart}
}