Campbell, John. "Index". Causation in Psychology, Cambridge, MA and London, England: Harvard University Press, 2020, pp. 201-203. https://doi.org/10.4159/9780674249547-008
Campbell, J. (2020). Index. In Causation in Psychology (pp. 201-203). Cambridge, MA and London, England: Harvard University Press. https://doi.org/10.4159/9780674249547-008
Campbell, J. 2020. Index. Causation in Psychology. Cambridge, MA and London, England: Harvard University Press, pp. 201-203. https://doi.org/10.4159/9780674249547-008
Campbell, John. "Index" In Causation in Psychology, 201-203. Cambridge, MA and London, England: Harvard University Press, 2020. https://doi.org/10.4159/9780674249547-008
Campbell J. Index. In: Causation in Psychology. Cambridge, MA and London, England: Harvard University Press; 2020. p.201-203. https://doi.org/10.4159/9780674249547-008