Cita APA (7a ed.)

Gutiérrez Bello, M., & Velilla Robertín, A. (1987). English for Spanish personnel: An English for special purposes book. Scott, Foresman.

Cita Chicago Style (17a ed.)

Gutiérrez Bello, Marta, y Angie Velilla Robertín. English for Spanish Personnel: An English for Special Purposes Book. Glenview, Illinois: Scott, Foresman, 1987.

Cita MLA (9a ed.)

Gutiérrez Bello, Marta, y Angie Velilla Robertín. English for Spanish Personnel: An English for Special Purposes Book. Scott, Foresman, 1987.