APA (7th ed.) Citation

MS, S., LD, S., & DL, R. (2000). The relationship of lumbar flexion to disability in patients with low back pain. Physical Therapy, 80(3), 240. https://doi.org/10.1093/ptj/80.3.240

Chicago Style (17th ed.) Citation

MS, Sullivan, Shoaf LD, and Riddle DL. "The Relationship of Lumbar Flexion to Disability in Patients with Low Back Pain." Physical Therapy 80, no. 3 (2000): 240. https://doi.org/10.1093/ptj/80.3.240.

MLA (9th ed.) Citation

MS, Sullivan, et al. "The Relationship of Lumbar Flexion to Disability in Patients with Low Back Pain." Physical Therapy, vol. 80, no. 3, 2000, p. 240, https://doi.org/10.1093/ptj/80.3.240.