Mellenbergh, G. J., Adèr, H. J., Baird, D., & Cornell, J. E. (2003). Conceptual Issues of Research Methodology for the Behavioural, Life and Social Sciences. Journal of the Royal Statistical Society. Series D (The Statistician), 52(2), 211-218.

Mellenbergh, Gideon J., Herman J. Adèr, Davis Baird, and John E. Cornell. "Conceptual Issues of Research Methodology for the Behavioural, Life and Social Sciences." Journal of the Royal Statistical Society. Series D (The Statistician) 52, no. 2 (2003): 211-218.

Mellenbergh, Gideon J., et al. "Conceptual Issues of Research Methodology for the Behavioural, Life and Social Sciences." Journal of the Royal Statistical Society. Series D (The Statistician), vol. 52, no. 2, 2003, pp. 211-218.