APA-referens (7:e uppl.)

Birrell, F., Croft, P., Cooper, C., Hosie, G., Macfarlane, G., & Silman, A. (2000). Radiographic change is common in new presenters in primary care with hip pain. PCR Hip Study Group.

Chicago-referens (17:e uppl.)

Birrell, F., P. Croft, C. Cooper, G. Hosie, G. Macfarlane, och A. Silman. Radiographic Change Is Common in New Presenters in Primary Care with Hip Pain. PCR Hip Study Group. 2000.

MLA-referens (9:e uppl.)

Birrell, F., et al. Radiographic Change Is Common in New Presenters in Primary Care with Hip Pain. PCR Hip Study Group. 2000.