Cita APA

Christensen, A., Bousfield, R., & Christiansen, J. (1988). Incidence of perforated and bleeding peptic ulcers before and after the introduction of H2-receptor antagonists.

Chicago Style Citation

Christensen, A., R. Bousfield, i J. Christiansen. Incidence of Perforated and Bleeding Peptic Ulcers Before and After the Introduction of H2-receptor Antagonists. 1988.

Cita MLA

Christensen, A., R. Bousfield, i J. Christiansen. Incidence of Perforated and Bleeding Peptic Ulcers Before and After the Introduction of H2-receptor Antagonists. 1988.