Van Oyen, H. (2009). If at first you don't succeed, try, try, try again. A message for Public Health Research in Belgium. BioMed Central.
استشهاد بنمط شيكاغوVan Oyen, H. If At First You Don't Succeed, Try, Try, Try Again. A Message for Public Health Research in Belgium. BioMed Central, 2009.
MLA استشهادVan Oyen, H. If At First You Don't Succeed, Try, Try, Try Again. A Message for Public Health Research in Belgium. BioMed Central, 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.