APA (7th ed.) Citation

Highfield, T., Kirchhoff, L., & Nicolai, T. (2011). Challenges of tracking topical discussion networks online.

Chicago Style (17th ed.) Citation

Highfield, Tim, L. Kirchhoff, and T. Nicolai. Challenges of Tracking Topical Discussion Networks Online. 2011.

MLA (9th ed.) Citation

Highfield, Tim, et al. Challenges of Tracking Topical Discussion Networks Online. 2011.