Cita APA (7th ed.)

Spittaels, H., Foster, C., Oppert, J., Rutter, H., Oja, P., Sjöström, M., & De Bourdeaudhuij, I. (2009). Assessment of environmental correlates of physical activity: Development of a European questionnaire.

Cita Chicago (17th ed.)

Spittaels, H., C. Foster, J. Oppert, H. Rutter, P. Oja, M. Sjöström, i I. De Bourdeaudhuij. Assessment of Environmental Correlates of Physical Activity: Development of a European Questionnaire. 2009.

Cita MLA (9th ed.)

Spittaels, H., et al. Assessment of Environmental Correlates of Physical Activity: Development of a European Questionnaire. 2009.