Citação norma APA

Howell, C. J., Dean, T., Lucking, L., Dziedzic, K., Jones, P. W., & Johanson, R. B. (2002). Randomised study of long term outcome after epidural versus non-epidural analgesia during labour. BMJ.

Citação norma Chicago

Howell, Charlotte J., Tracy Dean, Linda Lucking, Krysia Dziedzic, Peter W. Jones, and Richard B. Johanson. Randomised Study of Long Term Outcome After Epidural Versus Non-epidural Analgesia During Labour. BMJ, 2002.

Citação norma MLA

Howell, Charlotte J., et al. Randomised Study of Long Term Outcome After Epidural Versus Non-epidural Analgesia During Labour. BMJ, 2002.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.