Gropp, K. M., Pickett, W., & Janssen, I. (2012). Multi-level examination of correlates of active transportation to school among youth living within 1 mile of their school. BioMed Central.
استشهاد بنمط شيكاغوGropp, Kathleen M., William Pickett, و Ian Janssen. Multi-level Examination of Correlates of Active Transportation to School Among Youth Living Within 1 Mile of Their School. BioMed Central, 2012.
MLA استشهادGropp, Kathleen M., William Pickett, و Ian Janssen. Multi-level Examination of Correlates of Active Transportation to School Among Youth Living Within 1 Mile of Their School. BioMed Central, 2012.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.