Thomas, C. S., Nelson, N. P., Jahn, G. C., Niu, T., & Hartley, D. M. (2011). Use of media and public-domain Internet sources for detection and assessment of plant health threats. CoAction Publishing.

Thomas, Carla S., Noele P. Nelson, Gary C. Jahn, Tianchan Niu, و David M. Hartley. Use of Media and Public-domain Internet Sources for Detection and Assessment of Plant Health Threats. CoAction Publishing, 2011.

Thomas, Carla S., et al. Use of Media and Public-domain Internet Sources for Detection and Assessment of Plant Health Threats. CoAction Publishing, 2011.