Cita APA

Graham, D. Y. (2014). History of Helicobacter pylori, duodenal ulcer, gastric ulcer and gastric cancer. Baishideng Publishing Group Co., Limited.

Citación estilo Chicago

Graham, David Y. History of Helicobacter Pylori, Duodenal Ulcer, Gastric Ulcer and Gastric Cancer. Baishideng Publishing Group Co., Limited, 2014.

Cita MLA

Graham, David Y. History of Helicobacter Pylori, Duodenal Ulcer, Gastric Ulcer and Gastric Cancer. Baishideng Publishing Group Co., Limited, 2014.