van Berkel, J., Proper, K. I., van Dam, A., Boot, C. R., Bongers, P. M., & van der Beek, A. J. (2013). An exploratory study of associations of physical activity with mental health and work engagement. BioMed Central.

van Berkel, Jantien, Karin I. Proper, Annelies van Dam, Cécile RL Boot, Paulien M. Bongers, و Allard J. van der Beek. An Exploratory Study of Associations of Physical Activity With Mental Health and Work Engagement. BioMed Central, 2013.

van Berkel, Jantien, et al. An Exploratory Study of Associations of Physical Activity With Mental Health and Work Engagement. BioMed Central, 2013.