Cita APA (7a ed.)

Perrone, L., Mazza, M., & Ardao, A. R. (1973). Spontaneous hepaticoduodenal fistula of lithiasic origin.

Cita Chicago Style (17a ed.)

Perrone, Luis, Milton Mazza, y Alberto R. Ardao. Spontaneous Hepaticoduodenal Fistula of Lithiasic Origin. 1973.

Cita MLA (9a ed.)

Perrone, Luis, et al. Spontaneous Hepaticoduodenal Fistula of Lithiasic Origin. 1973.