Cite

    Malte Bödeker et al.. “Self-reported physical activity within and outside the neighborhood: Criterion-related validity of the Neighborhood Physical Activity Questionnaire in German older adults.” Measurement in physical education and exercise science, vol. 22, no. 1, 2018, pp. 61–69. http://access.bl.uk/ark:/81055/vdc_100054860531.0x00003b