Παραπομπή σε μορφή APA (7η εκδ.)

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.

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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