APA aipamena

Wijkstra, P. J., TenVergert, E. M., Van Altena, R., Otten, V., Postma, D. S., Kraan, J., & Koëter, G. H. (1994). Reliability and validity of the chronic respiratory questionnaire (CRQ).

Chicago Style aipamena

Wijkstra, P. J., E. M. TenVergert, R. Van Altena, V. Otten, D. S. Postma, J. Kraan, and G. H. Koëter. Reliability and Validity of the Chronic Respiratory Questionnaire (CRQ). 1994.

MLA aipamena

Wijkstra, P. J., et al. Reliability and Validity of the Chronic Respiratory Questionnaire (CRQ). 1994.