APA citiranje

Yajko, R. D., Norton, L. W., & Eiseman, B. (1975). Current management of upper gastrointestinal bleeding.

Citação norma Chicago

Yajko, R D., L W. Norton, and B. Eiseman. Current Management of Upper Gastrointestinal Bleeding. 1975.

MLA citiranje

Yajko, R D., L W. Norton, and B. Eiseman. Current Management of Upper Gastrointestinal Bleeding. 1975.

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