APA-viite

Wheatley, K. E., Snyman, J. H., Brearley, S., Keighley, M. R., & Dykes, P. W. (1990). Mortality in patients with bleeding peptic ulcer when those aged 60 or over are operated on early.

Chicago-tyylinen lähdeviittaus

Wheatley, K E., J H. Snyman, S. Brearley, M R. Keighley, ja P W. Dykes. Mortality in Patients With Bleeding Peptic Ulcer When Those Aged 60 or Over Are Operated On Early. 1990.

MLA-viite

Wheatley, K E., et al. Mortality in Patients With Bleeding Peptic Ulcer When Those Aged 60 or Over Are Operated On Early. 1990.

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