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APA Citation
Cook, T. L., De Bourdeaudhuij, I., Maes, L., Haerens, L., Grammatikaki, E., Widhalm, K., Kwak, L., Plada, M., Moreno, L. A., Zampelas, A., Tountas, Y., & Manios, Y. (n.d.). moderators of the Effectiveness of a Web‐Based Tailored Intervention Promoting Physical Activity in Adolescents: The HELENA Activ‐O‐Meter. Journal of school health, 84, 256–266. http://access.bl.uk/ark:/81055/vdc_100024792720.0x000003