Gill, D. P., Jones, G. R., Zou, G., & Speechley, M. (2012). Using a single question to assess physical activity in older adults: A reliability and validity study. BioMed Central.
استشهاد بنمط شيكاغوGill, Dawn P., Gareth R. Jones, Guangyong Zou, و Mark Speechley. Using a Single Question to Assess Physical Activity in Older Adults: A Reliability and Validity Study. BioMed Central, 2012.
MLA استشهادGill, Dawn P., Gareth R. Jones, Guangyong Zou, و Mark Speechley. Using a Single Question to Assess Physical Activity in Older Adults: A Reliability and Validity Study. BioMed Central, 2012.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.