Ashton, J. R., Machin, D., Osmond, C., Balajaran, R., Adam, S. A., & Donnan, S. P. (1983). Trends in induced abortion in England and Wales.
Chicago Style aipamenaAshton, J R., D. Machin, C. Osmond, R. Balajaran, S A. Adam, and S P. Donnan. Trends in Induced Abortion in England and Wales. 1983.
MLA aipamenaAshton, J R., et al. Trends in Induced Abortion in England and Wales. 1983.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.