APA (7th ed.) Citation

Liu, X., Tu, P., Rittscher, J., Perera, A., & Krahnstoever, N. (2005). Detecting and counting people in surveillance applications.

Chicago Style (17th ed.) Citation

Liu, X., P. Tu, J. Rittscher, A. Perera, and N. Krahnstoever. Detecting and Counting People in Surveillance Applications. 2005.

MLA (9th ed.) Citation

Liu, X., et al. Detecting and Counting People in Surveillance Applications. 2005.