APA

Sears M. R., Herbison G. P., Holdaway M. D., Hewitt C. J., Flannery E. M. & Silva P. A. (19890919). The relative risks of sensitivity to grass pollen, house dust mite and cat dander in the development of childhood asthma. : Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology.

Chicago

Sears M R, Herbison G P, Holdaway M D, Hewitt C J, Flannery E M and Silva P A. 19890919. The relative risks of sensitivity to grass pollen, house dust mite and cat dander in the development of childhood asthma. : Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology.

Harvard

Sears M. R., Herbison G. P., Holdaway M. D., Hewitt C. J., Flannery E. M. and Silva P. A. (19890919). The relative risks of sensitivity to grass pollen, house dust mite and cat dander in the development of childhood asthma. : Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology.

MLA

Sears M R, Herbison G P, Holdaway M D, Hewitt C J, Flannery E M and Silva P A. The relative risks of sensitivity to grass pollen, house dust mite and cat dander in the development of childhood asthma. : Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology. 19890919.