Dyfyniad APA

Vermeulen, R., Heederik, D., Kromhout, H., & Smit, H. A. (2002). Respiratory symptoms and occupation: A cross-sectional study of the general population. BioMed Central.

Dyfyniad Arddull Chicago

Vermeulen, Roel, Dick Heederik, Hans Kromhout, and Henriëtte A. Smit. Respiratory Symptoms and Occupation: A Cross-sectional Study of the General Population. BioMed Central, 2002.

Dyfyniad MLA

Vermeulen, Roel, Dick Heederik, Hans Kromhout, and Henriëtte A. Smit. Respiratory Symptoms and Occupation: A Cross-sectional Study of the General Population. BioMed Central, 2002.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.