APA (7th ed.) Citation

Warner, K., Dun, O., & Stal, M. (2008). Field observations and empirical research. University of Oxford.

Chicago Style (17th ed.) Citation

Warner, Koko, Olivia Dun, and Marc Stal. Field Observations and Empirical Research. University of Oxford, 2008.

MLA (9th ed.) Citation

Warner, Koko, et al. Field Observations and Empirical Research. University of Oxford, 2008.