APA Citation

Roberts, J. A. F. (1957). ABO Blood Groups and Duodenal Ulcer.

Citação norma Chicago

Roberts, J. A. Fraser. ABO Blood Groups and Duodenal Ulcer. 1957.

MLA Citation

Roberts, J. A. Fraser. ABO Blood Groups and Duodenal Ulcer. 1957.

Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.