Cita APA

Watkins, R. M., & Collin, J. (1985). Deaths from peptic ulceration.

Chicago Style Citation

Watkins, R M., i Jack Collin. Deaths From Peptic Ulceration. 1985.

Cita MLA

Watkins, R M., i Jack Collin. Deaths From Peptic Ulceration. 1985.

Atenció: Aquestes cites poden no estar 100% correctes.