APA (7th ed.) Citation

Higgs, P., Sacks-Davis, R., Aitken, C., & Hellard, M. (2015). How “Hidden” Are Unobserved Networks Among People Who Inject Drugs?

Chicago Style (17th ed.) Citation

Higgs, Peter, R. Sacks-Davis, C. Aitken, and M. Hellard. How “Hidden” Are Unobserved Networks Among People Who Inject Drugs? 2015.

MLA (9th ed.) Citation

Higgs, Peter, et al. How “Hidden” Are Unobserved Networks Among People Who Inject Drugs? 2015.