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.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSpittaels, H., C. Foster, J. Oppert, H. Rutter, P. Oja, M. Sjöström, और I. De Bourdeaudhuij. Assessment of Environmental Correlates of Physical Activity: Development of a European Questionnaire. 2009.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSpittaels, H., et al. Assessment of Environmental Correlates of Physical Activity: Development of a European Questionnaire. 2009.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.