Du, P., Coles, F. B., O'Campo, P., & McNutt, L. (2007). Changes in population characteristics and their implication on public health research. BioMed Central.
استشهاد بنمط شيكاغوDu, Ping, F Bruce Coles, Patricia O'Campo, و Louise-Anne McNutt. Changes in Population Characteristics and Their Implication On Public Health Research. BioMed Central, 2007.
MLA استشهادDu, Ping, F Bruce Coles, Patricia O'Campo, و Louise-Anne McNutt. Changes in Population Characteristics and Their Implication On Public Health Research. BioMed Central, 2007.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.