APA (7th ed.) Citation

Cooper, C., Cook, P. L., Osmond, C., Fisher, L., & Cawley, M. I. (1991). Osteoarthritis of the hip and osteoporosis of the proximal femur. Annals of the rheumatic diseases, 50(8), 540-542. https://doi.org/10.1136/ard.50.8.540

Chicago Style (17th ed.) Citation

Cooper, C., P L. Cook, C. Osmond, L. Fisher, and M I. Cawley. "Osteoarthritis of the Hip and Osteoporosis of the Proximal Femur." Annals of the Rheumatic Diseases 50, no. 8 (1991): 540-542. https://doi.org/10.1136/ard.50.8.540.

MLA (9th ed.) Citation

Cooper, C., et al. "Osteoarthritis of the Hip and Osteoporosis of the Proximal Femur." Annals of the Rheumatic Diseases, vol. 50, no. 8, 1991, pp. 540-542, https://doi.org/10.1136/ard.50.8.540.