APA

Van Tubergen A., Debats I., Ryser L., Londoño J., Burgos-Vargas R., Cardiel M. H., Landewé R., Stucki G. & Van Der Heijde D. (20020731). Use of a numerical rating scale as an answer modality in ankylosing spondylitis-specific questionnaires. : Arthritis and rheumatism.

Chicago

Van Tubergen Astrid, Debats Iris, Ryser Liliane, Londoño John, Burgos-Vargas Ruben, Cardiel Mario H, Landewé Robert, Stucki Gerold and Van Der Heijde Désirée. 20020731. Use of a numerical rating scale as an answer modality in ankylosing spondylitis-specific questionnaires. : Arthritis and rheumatism.

Harvard

Van Tubergen A., Debats I., Ryser L., Londoño J., Burgos-Vargas R., Cardiel M. H., Landewé R., Stucki G. and Van Der Heijde D. (20020731). Use of a numerical rating scale as an answer modality in ankylosing spondylitis-specific questionnaires. : Arthritis and rheumatism.

MLA

Van Tubergen Astrid, Debats Iris, Ryser Liliane, Londoño John, Burgos-Vargas Ruben, Cardiel Mario H, Landewé Robert, Stucki Gerold and Van Der Heijde Désirée. Use of a numerical rating scale as an answer modality in ankylosing spondylitis-specific questionnaires. : Arthritis and rheumatism. 20020731.