APA (7e ed.) Bronvermelding

Peter D. R. Higgins, Gale Harding, Nancy K. Leidy, Kendra DeBusk, Donald L. Patrick, Hema N. Viswanathan, . . . Gary Globe. (2018). Development and validation of the Crohn's disease patient-reported outcomes signs and symptoms (CD-PRO/SS) diary. SpringerOpen.

Chicago (17e ed.) Bronvermelding

Peter D. R. Higgins, et al. Development and Validation of the Crohn's Disease Patient-reported Outcomes Signs and Symptoms (CD-PRO/SS) Diary. SpringerOpen, 2018.

MLA (9e ed.) Bronvermelding

Peter D. R. Higgins, et al. Development and Validation of the Crohn's Disease Patient-reported Outcomes Signs and Symptoms (CD-PRO/SS) Diary. SpringerOpen, 2018.