Cita APA (7a ed.)

Viera, D. J., & Piqué, J. (1997). Applied languages: Theory and practice in ESP. [s.n].

Cita Chicago Style (17a ed.)

Viera, David J., y Jordi Piqué. Applied Languages: Theory and Practice in ESP. UniverSidad de Valencia, Valencia: [s.n], 1997.

Cita MLA (9a ed.)

Viera, David J., y Jordi Piqué. Applied Languages: Theory and Practice in ESP. [s.n], 1997.