Cita APA (7a ed.)

Hutchinson, T., & Waters, A. English for specific purposes. A learning-centred approach (5a ed.).

Cita Chicago Style (17a ed.)

Hutchinson, Tom, y Alan Waters. English for Specific Purposes. A Learning-centred Approach. 5a ed.

Cita MLA (8a ed.)

Hutchinson, Tom, y Alan Waters. English for Specific Purposes. A Learning-centred Approach. 5a ed.