Cook, T. D., & Campbell, D. T. (1979). Quasi-experimentation: Design & analysis issues for field settings. Rand McNally College Publishing.
Citación estilo ChicagoCook, Thomas D., and Donald Thomas Campbell. Quasi-experimentation: Design & Analysis Issues for Field Settings. Chicago: Rand McNally College Publishing, 1979.
Cita MLACook, Thomas D., and Donald Thomas Campbell. Quasi-experimentation: Design & Analysis Issues for Field Settings. Rand McNally College Publishing, 1979.
Warning: These citations may not always be 100% accurate.