Cita APA

Robertson, J. C., Helliwell, M. G., Cantrell, E. G., Cawley, M. I., & Ellis, R. M. (1982). Circadian variation in disease activity in rheumatoid arthritis.

Chicago Style Citation

Robertson, J C., M G. Helliwell, E G. Cantrell, M I. Cawley, i R M. Ellis. Circadian Variation in Disease Activity in Rheumatoid Arthritis. 1982.

Cita MLA

Robertson, J C., et al. Circadian Variation in Disease Activity in Rheumatoid Arthritis. 1982.