Vermeulen, R., Heederik, D., Kromhout, H., & Smit, H. A. (2002). Respiratory symptoms and occupation: A cross-sectional study of the general population. BioMed Central.
استشهاد بنمط شيكاغوVermeulen, Roel, Dick Heederik, Hans Kromhout, و Henriëtte A. Smit. Respiratory Symptoms and Occupation: A Cross-sectional Study of the General Population. BioMed Central, 2002.
MLA استشهادVermeulen, Roel, Dick Heederik, Hans Kromhout, و Henriëtte A. Smit. Respiratory Symptoms and Occupation: A Cross-sectional Study of the General Population. BioMed Central, 2002.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.