APA
Kollnig, K., Binns, R., Van Kleek, M., Zhao, J., Lyngs, U., Tinsman, C., & Shadbolt, N. (2021). Before and after GDPR: tracking in mobile apps. Internet Policy Review, 10(4). https://doi.org/10.14763/2021.4.1611
American Psychological Association. For more info, see https://www.apastyle.org
Chicago
Kollnig, Konrad, Binns, Reuben and Van Kleek, Max. 2021. "Before and after GDPR: tracking in mobile apps". Internet Policy Review 10 (4). DOI: 10.14763/2021.4.1611. https://policyreview.info/articles/analysis/and-after-gdpr-tracking-mobile-apps.
Chicago Referencing Style. For more info, see https://www.chicagomanualofstyle.org
Harvard
Kollnig, Konrad (2021). Before and after GDPR: tracking in mobile apps. Internet Policy Review,[online] 10(4). Available at: https://policyreview.info/articles/analysis/and-after-gdpr-tracking-mobile-apps [Accessed: 20 Aug. 2026].
Harvard Referencing Style
MLA
Kollnig, Konrad. "Before and after GDPR: tracking in mobile apps". Internet Policy Review 10.4 (2021). Web. 20 Aug. 2026.
Modern Language Association, 7th Ed. For more info, see https://owl.purdue.edu/owl/research_and_citation/mla_style/index.html
Vancouver
Kollnig K, Binns R, Van Kleek M, Zhao J, Lyngs U, Tinsman C. Before and after GDPR: tracking in mobile apps. Internet Policy Review [Internet]. 2021 [20 August 2026];10(4). Available from: https://policyreview.info/articles/analysis/and-after-gdpr-tracking-mobile-apps